Requests Module
Requests is an elegant and simple HTTP library for Python, built for human beings.
Behold, the power of Requests:
See similar code, sans Requests.
Requests allows you to send HTTP/1.1 requests extremely easily. There’s no need to manually add query strings to your URLs, or to form-encode your POST data. Keep-alive and HTTP connection pooling are 100% automatic, thanks to urllib3.
Beloved Features
Requests is ready for today’s web.
Keep-Alive & Connection Pooling
International Domains and URLs
Sessions with Cookie Persistence
Browser-style SSL Verification
Automatic Content Decoding
Basic/Digest Authentication
Elegant Key/Value Cookies
Automatic Decompression
Unicode Response Bodies
HTTP(S) Proxy Support
Multipart File Uploads
Streaming Downloads
Connection Timeouts
Chunked Requests
.netrc
Support
Requests officially supports Python 2.7 & 3.6+, and runs great on PyPy.
The User Guide
This part of the documentation, which is mostly prose, begins with some background information about Requests, then focuses on step-by-step instructions for getting the most out of Requests.
The Community Guide
This part of the documentation, which is mostly prose, details the Requests ecosystem and community.
The API Documentation / Guide
If you are looking for information on a specific function, class, or method, this part of the documentation is for you.
Main Interface
All of Requests’ functionality can be accessed by these 7 methods. They all return an instance of the Response
object.requests.request
(method, url, **kwargs)[source]
Constructs and sends a Request
.
Parameters: |
|
Returns: |
|
Return type: |
Usage:
requests.head
(url, **kwargs)[source]
Sends a HEAD request.
Parameters: | |
Returns: |
|
Return type: |
requests.get
(url, params=None, **kwargs)[source]
Sends a GET request.
Parameters: | |
Returns: |
|
Return type: |
requests.post
(url, data=None, json=None, **kwargs)[source]
Sends a POST request.
Parameters: | |
Returns: |
|
Return type: |
requests.put
(url, data=None, **kwargs)[source]
Sends a PUT request.
Parameters: | |
Returns: |
|
Return type: |
requests.patch
(url, data=None, **kwargs)[source]
Sends a PATCH request.
Parameters: | |
Returns: |
|
Return type: |
requests.delete
(url, **kwargs)[source]
Sends a DELETE request.
Parameters: |
|
Returns: |
|
Return type: |
Exceptions
exception requests.RequestException
(*args, **kwargs)[source]
There was an ambiguous exception that occurred while handling your request.exception requests.ConnectionError
(*args, **kwargs)[source]
A Connection error occurred.exception requests.HTTPError
(*args, **kwargs)[source]
An HTTP error occurred.exception requests.URLRequired
(*args, **kwargs)[source]
A valid URL is required to make a request.exception requests.TooManyRedirects
(*args, **kwargs)[source]
Too many redirects.exception requests.ConnectTimeout
(*args, **kwargs)[source]
The request timed out while trying to connect to the remote server.
Requests that produced this error are safe to retry.exception requests.ReadTimeout
(*args, **kwargs)[source]
The server did not send any data in the allotted amount of time.exception requests.Timeout
(*args, **kwargs)[source]
The request timed out.
Catching this error will catch both ConnectTimeout
and ReadTimeout
errors.
Request Sessions
class requests.Session
[source]
A Requests session.
Provides cookie persistence, connection-pooling, and configuration.
Basic Usage:
Or as a context manager:
auth
= None
Default Authentication tuple or object to attach to Request
.cert
= None
SSL client certificate default, if String, path to ssl client cert file (.pem). If Tuple, (‘cert’, ‘key’) pair.close
()[source]
Closes all adapters and as such the sessioncookies
= None
A CookieJar containing all currently outstanding cookies set on this session. By default it is a RequestsCookieJar
, but may be any other cookielib.CookieJar
compatible object.delete
(url, **kwargs)[source]
Sends a DELETE request. Returns Response
object.
Parameters: |
|
Return type: |
get
(url, **kwargs)[source]
Sends a GET request. Returns Response
object.
Parameters: |
|
Return type: |
get_adapter
(url)[source]
Returns the appropriate connection adapter for the given URL.
Return type: |
get_redirect_target
(resp)
Receives a Response. Returns a redirect URI or Nonehead
(url, **kwargs)[source]
Sends a HEAD request. Returns Response
object.
Parameters: |
|
Return type: |
headers
= None
A case-insensitive dictionary of headers to be sent on each Request
sent from this Session
.hooks
= None
Event-handling hooks.max_redirects
= None
Maximum number of redirects allowed. If the request exceeds this limit, a TooManyRedirects
exception is raised. This defaults to requests.models.DEFAULT_REDIRECT_LIMIT, which is 30.merge_environment_settings
(url, proxies, stream, verify, cert)[source]
Check the environment and merge it with some settings.
Return type: |
mount
(prefix, adapter)[source]
Registers a connection adapter to a prefix.
Adapters are sorted in descending order by prefix length.options
(url, **kwargs)[source]
Sends a OPTIONS request. Returns Response
object.
Parameters: |
|
Return type: |
params
= None
Dictionary of querystring data to attach to each Request
. The dictionary values may be lists for representing multivalued query parameters.patch
(url, data=None, **kwargs)[source]
Sends a PATCH request. Returns Response
object.
Parameters: | |
Return type: |
post
(url, data=None, json=None, **kwargs)[source]
Sends a POST request. Returns Response
object.
Parameters: | |
Return type: |
prepare_request
(request)[source]
Constructs a PreparedRequest
for transmission and returns it. The PreparedRequest
has settings merged from the Request
instance and those of the Session
.
Parameters: | request – |
Return type: |
proxies
= None
Dictionary mapping protocol or protocol and host to the URL of the proxy (e.g. {‘http’: ‘foo.bar:3128’, ‘http://host.name’: ‘foo.bar:4012’}) to be used on each Request
.put
(url, data=None, **kwargs)[source]
Sends a PUT request. Returns Response
object.
Parameters: | |
Return type: |
rebuild_auth
(prepared_request, response)
When being redirected we may want to strip authentication from the request to avoid leaking credentials. This method intelligently removes and reapplies authentication where possible to avoid credential loss.rebuild_method
(prepared_request, response)
When being redirected we may want to change the method of the request based on certain specs or browser behavior.rebuild_proxies
(prepared_request, proxies)
This method re-evaluates the proxy configuration by considering the environment variables. If we are redirected to a URL covered by NO_PROXY, we strip the proxy configuration. Otherwise, we set missing proxy keys for this URL (in case they were stripped by a previous redirect).
This method also replaces the Proxy-Authorization header where necessary.
Return type: |
request
(method, url, params=None, data=None, headers=None, cookies=None, files=None, auth=None, timeout=None, allow_redirects=True, proxies=None, hooks=None, stream=None, verify=None, cert=None, json=None)[source]
Constructs a Request
, prepares it and sends it. Returns Response
object.
Parameters: |
|
Return type: |
resolve_redirects
(resp, req, stream=False, timeout=None, verify=True, cert=None, proxies=None, yield_requests=False, **adapter_kwargs)
Receives a Response. Returns a generator of Responses or Requests.send
(request, **kwargs)[source]
Send a given PreparedRequest.
Return type: |
should_strip_auth
(old_url, new_url)
Decide whether Authorization header should be removed when redirectingstream
= None
Stream response content default.trust_env
= None
Trust environment settings for proxy configuration, default authentication and similar.verify
= None
SSL Verification default. Defaults to True, requiring requests to verify the TLS certificate at the remote end. If verify is set to False, requests will accept any TLS certificate presented by the server, and will ignore hostname mismatches and/or expired certificates, which will make your application vulnerable to man-in-the-middle (MitM) attacks. Only set this to False for testing.
Lower-Level Classes
class requests.Request
(method=None, url=None, headers=None, files=None, data=None, params=None, auth=None, cookies=None, hooks=None, json=None)[source]
A user-created Request
object.
Used to prepare a PreparedRequest
, which is sent to the server.
Parameters: |
|
Usage:
deregister_hook
(event, hook)
Deregister a previously registered hook. Returns True if the hook existed, False if not.prepare
()[source]
Constructs a PreparedRequest
for transmission and returns it.register_hook
(event, hook)
Properly register a hook.class requests.Response
[source]
The Response
object, which contains a server’s response to an HTTP request.apparent_encoding
The apparent encoding, provided by the charset_normalizer or chardet libraries.close
()[source]
Releases the connection back to the pool. Once this method has been called the underlying raw
object must not be accessed again.
Note: Should not normally need to be called explicitly.content
Content of the response, in bytes.cookies
= None
A CookieJar of Cookies the server sent back.elapsed
= None
The amount of time elapsed between sending the request and the arrival of the response (as a timedelta). This property specifically measures the time taken between sending the first byte of the request and finishing parsing the headers. It is therefore unaffected by consuming the response content or the value of the stream
keyword argument.encoding
= None
Encoding to decode with when accessing r.text.headers
= None
Case-insensitive Dictionary of Response Headers. For example, headers['content-encoding']
will return the value of a 'Content-Encoding'
response header.history
= None
A list of Response
objects from the history of the Request. Any redirect responses will end up here. The list is sorted from the oldest to the most recent request.is_permanent_redirect
True if this Response one of the permanent versions of redirect.is_redirect
True if this Response is a well-formed HTTP redirect that could have been processed automatically (by Session.resolve_redirects
).iter_content
(chunk_size=1, decode_unicode=False)[source]
Iterates over the response data. When stream=True is set on the request, this avoids reading the content at once into memory for large responses. The chunk size is the number of bytes it should read into memory. This is not necessarily the length of each item returned as decoding can take place.
chunk_size must be of type int or None. A value of None will function differently depending on the value of stream. stream=True will read data as it arrives in whatever size the chunks are received. If stream=False, data is returned as a single chunk.
If decode_unicode is True, content will be decoded using the best available encoding based on the response.iter_lines
(chunk_size=512, decode_unicode=False, delimiter=None)[source]
Iterates over the response data, one line at a time. When stream=True is set on the request, this avoids reading the content at once into memory for large responses.
Note
This method is not reentrant safe.json
(**kwargs)[source]
Returns the json-encoded content of a response, if any.
Parameters: | **kwargs – Optional arguments that |
Raises: | requests.exceptions.JSONDecodeError – If the response body does not contain valid json. |
links
Returns the parsed header links of the response, if any.next
Returns a PreparedRequest for the next request in a redirect chain, if there is one.ok
Returns True if status_code
is less than 400, False if not.
This attribute checks if the status code of the response is between 400 and 600 to see if there was a client error or a server error. If the status code is between 200 and 400, this will return True. This is not a check to see if the response code is 200 OK
.raise_for_status
()[source]
Raises HTTPError
, if one occurred.raw
= None
File-like object representation of response (for advanced usage). Use of raw
requires that stream=True
be set on the request. This requirement does not apply for use internally to Requests.reason
= None
Textual reason of responded HTTP Status, e.g. “Not Found” or “OK”.request
= None
The PreparedRequest
object to which this is a response.status_code
= None
Integer Code of responded HTTP Status, e.g. 404 or 200.text
Content of the response, in unicode.
If Response.encoding is None, encoding will be guessed using charset_normalizer
or chardet
.
The encoding of the response content is determined based solely on HTTP headers, following RFC 2616 to the letter. If you can take advantage of non-HTTP knowledge to make a better guess at the encoding, you should set r.encoding
appropriately before accessing this property.url
= None
Final URL location of Response.
Lower-Lower-Level Classes
class requests.PreparedRequest
[source]
The fully mutable PreparedRequest
object, containing the exact bytes that will be sent to the server.
Instances are generated from a Request
object, and should not be instantiated manually; doing so may produce undesirable effects.
Usage:
body
= None
request body to send to the server.deregister_hook
(event, hook)
Deregister a previously registered hook. Returns True if the hook existed, False if not.headers
= None
dictionary of HTTP headers.hooks
= None
dictionary of callback hooks, for internal usage.method
= None
HTTP verb to send to the server.path_url
Build the path URL to use.prepare
(method=None, url=None, headers=None, files=None, data=None, params=None, auth=None, cookies=None, hooks=None, json=None)[source]
Prepares the entire request with the given parameters.prepare_auth
(auth, url='')[source]
Prepares the given HTTP auth data.prepare_body
(data, files, json=None)[source]
Prepares the given HTTP body data.prepare_content_length
(body)[source]
Prepare Content-Length header based on request method and bodyprepare_cookies
(cookies)[source]
Prepares the given HTTP cookie data.
This function eventually generates a Cookie
header from the given cookies using cookielib. Due to cookielib’s design, the header will not be regenerated if it already exists, meaning this function can only be called once for the life of the PreparedRequest
object. Any subsequent calls to prepare_cookies
will have no actual effect, unless the “Cookie” header is removed beforehand.prepare_headers
(headers)[source]
Prepares the given HTTP headers.prepare_hooks
(hooks)[source]
Prepares the given hooks.prepare_method
(method)[source]
Prepares the given HTTP method.prepare_url
(url, params)[source]
Prepares the given HTTP URL.register_hook
(event, hook)
Properly register a hook.url
= None
HTTP URL to send the request to.class requests.adapters.BaseAdapter
[source]
The Base Transport Adapterclose
()[source]
Cleans up adapter specific items.send
(request, stream=False, timeout=None, verify=True, cert=None, proxies=None)[source]
Sends PreparedRequest object. Returns Response object.
Parameters: |
|
class requests.adapters.HTTPAdapter
(pool_connections=10, pool_maxsize=10, max_retries=0, pool_block=False)[source]
The built-in HTTP Adapter for urllib3.
Provides a general-case interface for Requests sessions to contact HTTP and HTTPS urls by implementing the Transport Adapter interface. This class will usually be created by the Session
class under the covers.
Parameters: |
|
Usage:
add_headers
(request, **kwargs)[source]
Add any headers needed by the connection. As of v2.0 this does nothing by default, but is left for overriding by users that subclass the HTTPAdapter
.
This should not be called from user code, and is only exposed for use when subclassing the HTTPAdapter
.
Parameters: |
|
build_response
(req, resp)[source]
Builds a Response
object from a urllib3 response. This should not be called from user code, and is only exposed for use when subclassing the HTTPAdapter
Parameters: |
|
Return type: |
cert_verify
(conn, url, verify, cert)[source]
Verify a SSL certificate. This method should not be called from user code, and is only exposed for use when subclassing the HTTPAdapter
.
Parameters: |
|
close
()[source]
Disposes of any internal state.
Currently, this closes the PoolManager and any active ProxyManager, which closes any pooled connections.get_connection
(url, proxies=None)[source]
Returns a urllib3 connection for the given URL. This should not be called from user code, and is only exposed for use when subclassing the HTTPAdapter
.
Parameters: |
|
Return type: | urllib3.ConnectionPool |
init_poolmanager
(connections, maxsize, block=False, **pool_kwargs)[source]
Initializes a urllib3 PoolManager.
This method should not be called from user code, and is only exposed for use when subclassing the HTTPAdapter
.
Parameters: |
|
proxy_headers
(proxy)[source]
Returns a dictionary of the headers to add to any request sent through a proxy. This works with urllib3 magic to ensure that they are correctly sent to the proxy, rather than in a tunnelled request if CONNECT is being used.
This should not be called from user code, and is only exposed for use when subclassing the HTTPAdapter
.
Parameters: | proxy – The url of the proxy being used for this request. |
Return type: |
proxy_manager_for
(proxy, **proxy_kwargs)[source]
Return urllib3 ProxyManager for the given proxy.
This method should not be called from user code, and is only exposed for use when subclassing the HTTPAdapter
.
Parameters: |
|
Returns: | ProxyManager |
Return type: |
request_url
(request, proxies)[source]
Obtain the url to use when making the final request.
If the message is being sent through a HTTP proxy, the full URL has to be used. Otherwise, we should only use the path portion of the URL.
This should not be called from user code, and is only exposed for use when subclassing the HTTPAdapter
.
Parameters: |
|
Return type: |
send
(request, stream=False, timeout=None, verify=True, cert=None, proxies=None)[source]
Sends PreparedRequest object. Returns Response object.
Parameters: |
|
Return type: |
Authentication
class requests.auth.AuthBase
[source]
Base class that all auth implementations derive fromclass requests.auth.HTTPBasicAuth
(username, password)[source]
Attaches HTTP Basic Authentication to the given Request object.class requests.auth.HTTPProxyAuth
(username, password)[source]
Attaches HTTP Proxy Authentication to a given Request object.class requests.auth.HTTPDigestAuth
(username, password)[source]
Attaches HTTP Digest Authentication to the given Request object.
Encodings
requests.utils.get_encodings_from_content
(content)[source]
Returns encodings from given content string.
Parameters: | content – bytestring to extract encodings from. |
requests.utils.get_encoding_from_headers
(headers)[source]
Returns encodings from given HTTP Header Dict.
Parameters: | headers – dictionary to extract encoding from. |
Return type: |
requests.utils.get_unicode_from_response
(r)[source]
Returns the requested content back in unicode.
Parameters: | r – Response object to get unicode content from. |
Tried:
charset from content-type
fall back and replace all unicode characters
Return type: |
Cookies
requests.utils.dict_from_cookiejar
(cj)[source]
Returns a key/value dictionary from a CookieJar.
Parameters: | cj – CookieJar object to extract cookies from. |
Return type: |
requests.utils.add_dict_to_cookiejar
(cj, cookie_dict)[source]
Returns a CookieJar from a key/value dictionary.
Parameters: |
|
Return type: | CookieJar |
requests.cookies.cookiejar_from_dict
(cookie_dict, cookiejar=None, overwrite=True)[source]
Returns a CookieJar from a key/value dictionary.
Parameters: |
|
Return type: | CookieJar |
class requests.cookies.RequestsCookieJar
(policy=None)[source]
Compatibility class; is a cookielib.CookieJar, but exposes a dict interface.
This is the CookieJar we create by default for requests and sessions that don’t specify one, since some clients may expect response.cookies and session.cookies to support dict operations.
Requests does not use the dict interface internally; it’s just for compatibility with external client code. All requests code should work out of the box with externally provided instances of CookieJar
, e.g. LWPCookieJar
and FileCookieJar
.
Unlike a regular CookieJar, this class is pickleable.
Warning
dictionary operations that are normally O(1) may be O(n).add_cookie_header
(request)
Add correct Cookie: header to request (urllib2.Request object).
The Cookie2 header is also added unless policy.hide_cookie2 is true.clear
(domain=None, path=None, name=None)
Clear some cookies.
Invoking this method without arguments will clear all cookies. If given a single argument, only cookies belonging to that domain will be removed. If given two arguments, cookies belonging to the specified path within that domain are removed. If given three arguments, then the cookie with the specified name, path and domain is removed.
Raises KeyError if no matching cookie exists.clear_expired_cookies
()
Discard all expired cookies.
You probably don’t need to call this method: expired cookies are never sent back to the server (provided you’re using DefaultCookiePolicy), this method is called by CookieJar itself every so often, and the .save() method won’t save expired cookies anyway (unless you ask otherwise by passing a true ignore_expires argument).clear_session_cookies
()
Discard all session cookies.
Note that the .save() method won’t save session cookies anyway, unless you ask otherwise by passing a true ignore_discard argument.copy
()[source]
Return a copy of this RequestsCookieJar.extract_cookies
(response, request)
Extract cookies from response, where allowable given the request.get
(name, default=None, domain=None, path=None)[source]
Dict-like get() that also supports optional domain and path args in order to resolve naming collisions from using one cookie jar over multiple domains.
Warning
operation is O(n), not O(1).get_dict
(domain=None, path=None)[source]
Takes as an argument an optional domain and path and returns a plain old Python dict of name-value pairs of cookies that meet the requirements.
Return type: |
get_policy
()[source]
Return the CookiePolicy instance used.items
()[source]
Dict-like items() that returns a list of name-value tuples from the jar. Allows client-code to call dict(RequestsCookieJar)
and get a vanilla python dict of key value pairs.
See also
keys() and values().iteritems
()[source]
Dict-like iteritems() that returns an iterator of name-value tuples from the jar.
See also
iterkeys() and itervalues().iterkeys
()[source]
Dict-like iterkeys() that returns an iterator of names of cookies from the jar.
See also
itervalues() and iteritems().itervalues
()[source]
Dict-like itervalues() that returns an iterator of values of cookies from the jar.
See also
iterkeys() and iteritems().keys
()[source]
Dict-like keys() that returns a list of names of cookies from the jar.
See also
values() and items().list_domains
()[source]
Utility method to list all the domains in the jar.list_paths
()[source]
Utility method to list all the paths in the jar.make_cookies
(response, request)
Return sequence of Cookie objects extracted from response object.multiple_domains
()[source]
Returns True if there are multiple domains in the jar. Returns False otherwise.
Return type: |
pop
(k[, d]) → v, remove specified key and return the corresponding value.
If key is not found, d is returned if given, otherwise KeyError is raised.popitem
() → (k, v), remove and return some (key, value) pair
as a 2-tuple; but raise KeyError if D is empty.set
(name, value, **kwargs)[source]
Dict-like set() that also supports optional domain and path args in order to resolve naming collisions from using one cookie jar over multiple domains.set_cookie
(cookie, *args, **kwargs)[source]
Set a cookie, without checking whether or not it should be set.set_cookie_if_ok
(cookie, request)
Set a cookie if policy says it’s OK to do so.setdefault
(k[, d]) → D.get(k,d), also set D[k]=d if k not in Dupdate
(other)[source]
Updates this jar with cookies from another CookieJar or dict-likevalues
()[source]
Dict-like values() that returns a list of values of cookies from the jar.
See also
keys() and items().class requests.cookies.CookieConflictError
[source]
There are two cookies that meet the criteria specified in the cookie jar. Use .get and .set and include domain and path args in order to be more specific.
Status Code Lookup
requests.codes
The codes
object defines a mapping from common names for HTTP statuses to their numerical codes, accessible either as attributes or as dictionary items.
Example:
Some codes have multiple names, and both upper- and lower-case versions of the names are allowed. For example, codes.ok
, codes.OK
, and codes.okay
all correspond to the HTTP status code 200.
100:
continue
101:
switching_protocols
102:
processing
103:
checkpoint
122:
uri_too_long
,request_uri_too_long
200:
ok
,okay
,all_ok
,all_okay
,all_good
,\o/
,✓
201:
created
202:
accepted
203:
non_authoritative_info
,non_authoritative_information
204:
no_content
205:
reset_content
,reset
206:
partial_content
,partial
207:
multi_status
,multiple_status
,multi_stati
,multiple_stati
208:
already_reported
226:
im_used
300:
multiple_choices
301:
moved_permanently
,moved
,\o-
302:
found
303:
see_other
,other
304:
not_modified
305:
use_proxy
306:
switch_proxy
307:
temporary_redirect
,temporary_moved
,temporary
308:
permanent_redirect
,resume_incomplete
,resume
400:
bad_request
,bad
401:
unauthorized
402:
payment_required
,payment
403:
forbidden
404:
not_found
,-o-
405:
method_not_allowed
,not_allowed
406:
not_acceptable
407:
proxy_authentication_required
,proxy_auth
,proxy_authentication
408:
request_timeout
,timeout
409:
conflict
410:
gone
411:
length_required
412:
precondition_failed
,precondition
413:
request_entity_too_large
414:
request_uri_too_large
415:
unsupported_media_type
,unsupported_media
,media_type
416:
requested_range_not_satisfiable
,requested_range
,range_not_satisfiable
417:
expectation_failed
418:
im_a_teapot
,teapot
,i_am_a_teapot
421:
misdirected_request
422:
unprocessable_entity
,unprocessable
423:
locked
424:
failed_dependency
,dependency
425:
unordered_collection
,unordered
426:
upgrade_required
,upgrade
428:
precondition_required
,precondition
429:
too_many_requests
,too_many
431:
header_fields_too_large
,fields_too_large
444:
no_response
,none
449:
retry_with
,retry
450:
blocked_by_windows_parental_controls
,parental_controls
451:
unavailable_for_legal_reasons
,legal_reasons
499:
client_closed_request
500:
internal_server_error
,server_error
,/o\
,✗
501:
not_implemented
502:
bad_gateway
503:
service_unavailable
,unavailable
504:
gateway_timeout
505:
http_version_not_supported
,http_version
506:
variant_also_negotiates
507:
insufficient_storage
509:
bandwidth_limit_exceeded
,bandwidth
510:
not_extended
511:
network_authentication_required
,network_auth
,network_authentication
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