How are POST and GET variables handled in Python

Question

In PHP you can just use   POST for POST and   GET for GET  Query string  variables  What s the equivalent in Python

User · Answer

It somewhat depends on what you use as a CGI framework, but they are available in dictionaries accessible to the program. I'd point you to the docs, but I'm not getting through to python.org right now. But this note on mail.python.org will give you a first pointer. Look at the CGI and URLLIB Python libs for more.

Update

Okay, that link busted. Here's the basic wsgi ref

User · Answer

Python is only a language  to get GET and POST data  you need a web framework or toolkit written in Python   Django is one  as Charlie points out  the cgi and urllib standard modules are others   Also available are Turbogears  Pylons  CherryPy  web py  mod python  fastcgi  etc  etc   In Django  your view functions receive a request argument which has request GET and request POST   Other frameworks will do it differently

User · Answer

suppose you re posting a html form with this    lt input type  text  name  username  gt    If using raw cgi   import cgi form   cgi FieldStorage   print form  username     If using Django  Pylons  Flask or Pyramid    print request GET  username     for GET form method print request POST  username     for POST form method   Using Turbogears  Cherrypy   from cherrypy import request print request params  username     Web py   form   web input   print form username   Werkzeug   print request form  username     If using Cherrypy or Turbogears  you can also define your handler function taking a parameter directly   def index self  username       print username   Google App Engine   class SomeHandler webapp2 RequestHandler       def post self           name   self request get  username     this will get the value from the field named username         self response write name    this will write on the document   So you really will have to choose one of those frameworks

User · Answer

I know this is an old question  Yet it s surprising that no good answer was given   First of all the question is completely valid without mentioning the framework  The CONTEXT is a PHP language equivalence  Although there are many ways to get the query string parameters in Python  the framework variables are just conveniently populated  In PHP    GET and   POST are also convenience variables  They are parsed from QUERY URI and php   input respectively   In Python  these functions would be os getenv  QUERY STRING   and sys stdin read    Remember to import os and sys modules   We have to be careful with the word  CGI  here  especially when talking about two languages and their commonalities when interfacing with a web server  1  CGI  as a protocol  defines the data transport mechanism in the HTTP protocol  2  Python can be configured to run as a CGI-script in Apache  3  The CGI module in Python offers some convenience functions   Since the HTTP protocol is language-independent  and that Apache s CGI extension is also language-independent  getting the GET and POST parameters should bear only syntax differences across languages   Here s the Python routine to populate a GET dictionary   GET    args os getenv  QUERY STRING   split   amp     for arg in args       t arg split          if len t  gt 1  k v arg split       GET k  v   and for POST   POST    args sys stdin read   split   amp     for arg in args       t arg split          if len t  gt 1  k  v arg split       POST k  v   You can now access the fields as following   print GET get  user id   print POST get  user name     I must also point out that the CGI module doesn t work well  Consider this HTTP request   POST   test py user id 6  user name Bob amp age 30   Using CGI FieldStorage   getvalue  user id   will cause a null pointer exception because the module blindly checks the POST data  ignoring the fact that a POST request can carry GET parameters too

User · Answer

They are stored in the CGI fieldstorage object   import cgi form   cgi FieldStorage    print  The user entered  s    form getvalue  uservalue

User · Answer

Python is only a language  to get GET and POST data  you need a web framework or toolkit written in Python   Django is one  as Charlie points out  the cgi and urllib standard modules are others   Also available are Turbogears  Pylons  CherryPy  web py  mod python  fastcgi  etc  etc   In Django  your view functions receive a request argument which has request GET and request POST   Other frameworks will do it differently

User · Answer

They are stored in the CGI fieldstorage object   import cgi form   cgi FieldStorage    print  The user entered  s    form getvalue  uservalue

User · Answer

Python is only a language  to get GET and POST data  you need a web framework or toolkit written in Python   Django is one  as Charlie points out  the cgi and urllib standard modules are others   Also available are Turbogears  Pylons  CherryPy  web py  mod python  fastcgi  etc  etc   In Django  your view functions receive a request argument which has request GET and request POST   Other frameworks will do it differently

User · Answer

They are stored in the CGI fieldstorage object   import cgi form   cgi FieldStorage    print  The user entered  s    form getvalue  uservalue

User · Answer

They are stored in the CGI fieldstorage object   import cgi form   cgi FieldStorage    print  The user entered  s    form getvalue  uservalue

User · Answer

It somewhat depends on what you use as a CGI framework, but they are available in dictionaries accessible to the program. I'd point you to the docs, but I'm not getting through to python.org right now. But this note on mail.python.org will give you a first pointer. Look at the CGI and URLLIB Python libs for more.

Update

Okay, that link busted. Here's the basic wsgi ref

User · Answer

I ve found nosklo s answer very extensive and useful  For those  like myself  who might find accessing the raw request data directly also useful  I would like to add the way to do that   import os  sys    the query string  which contains the raw GET data    For example  for http   example com myscript py a b amp c d amp e   this is  a b amp c d amp e   os getenv  QUERY STRING      the raw POST data sys stdin read

User · Answer

Python is only a language  to get GET and POST data  you need a web framework or toolkit written in Python   Django is one  as Charlie points out  the cgi and urllib standard modules are others   Also available are Turbogears  Pylons  CherryPy  web py  mod python  fastcgi  etc  etc   In Django  your view functions receive a request argument which has request GET and request POST   Other frameworks will do it differently

User · Answer

suppose you re posting a html form with this    lt input type  text  name  username  gt    If using raw cgi   import cgi form   cgi FieldStorage   print form  username     If using Django  Pylons  Flask or Pyramid    print request GET  username     for GET form method print request POST  username     for POST form method   Using Turbogears  Cherrypy   from cherrypy import request print request params  username     Web py   form   web input   print form username   Werkzeug   print request form  username     If using Cherrypy or Turbogears  you can also define your handler function taking a parameter directly   def index self  username       print username   Google App Engine   class SomeHandler webapp2 RequestHandler       def post self           name   self request get  username     this will get the value from the field named username         self response write name    this will write on the document   So you really will have to choose one of those frameworks

User · Answer

I ve found nosklo s answer very extensive and useful  For those  like myself  who might find accessing the raw request data directly also useful  I would like to add the way to do that   import os  sys    the query string  which contains the raw GET data    For example  for http   example com myscript py a b amp c d amp e   this is  a b amp c d amp e   os getenv  QUERY STRING      the raw POST data sys stdin read

User · Answer

It somewhat depends on what you use as a CGI framework, but they are available in dictionaries accessible to the program. I'd point you to the docs, but I'm not getting through to python.org right now. But this note on mail.python.org will give you a first pointer. Look at the CGI and URLLIB Python libs for more.

Update

Okay, that link busted. Here's the basic wsgi ref

User · Answer

suppose you re posting a html form with this    lt input type  text  name  username  gt    If using raw cgi   import cgi form   cgi FieldStorage   print form  username     If using Django  Pylons  Flask or Pyramid    print request GET  username     for GET form method print request POST  username     for POST form method   Using Turbogears  Cherrypy   from cherrypy import request print request params  username     Web py   form   web input   print form username   Werkzeug   print request form  username     If using Cherrypy or Turbogears  you can also define your handler function taking a parameter directly   def index self  username       print username   Google App Engine   class SomeHandler webapp2 RequestHandler       def post self           name   self request get  username     this will get the value from the field named username         self response write name    this will write on the document   So you really will have to choose one of those frameworks

User · Answer

suppose you re posting a html form with this    lt input type  text  name  username  gt    If using raw cgi   import cgi form   cgi FieldStorage   print form  username     If using Django  Pylons  Flask or Pyramid    print request GET  username     for GET form method print request POST  username     for POST form method   Using Turbogears  Cherrypy   from cherrypy import request print request params  username     Web py   form   web input   print form username   Werkzeug   print request form  username     If using Cherrypy or Turbogears  you can also define your handler function taking a parameter directly   def index self  username       print username   Google App Engine   class SomeHandler webapp2 RequestHandler       def post self           name   self request get  username     this will get the value from the field named username         self response write name    this will write on the document   So you really will have to choose one of those frameworks

User · Answer

It somewhat depends on what you use as a CGI framework, but they are available in dictionaries accessible to the program. I'd point you to the docs, but I'm not getting through to python.org right now. But this note on mail.python.org will give you a first pointer. Look at the CGI and URLLIB Python libs for more.

Update

Okay, that link busted. Here's the basic wsgi ref

User · Answer

I know this is an old question  Yet it s surprising that no good answer was given   First of all the question is completely valid without mentioning the framework  The CONTEXT is a PHP language equivalence  Although there are many ways to get the query string parameters in Python  the framework variables are just conveniently populated  In PHP    GET and   POST are also convenience variables  They are parsed from QUERY URI and php   input respectively   In Python  these functions would be os getenv  QUERY STRING   and sys stdin read    Remember to import os and sys modules   We have to be careful with the word  CGI  here  especially when talking about two languages and their commonalities when interfacing with a web server  1  CGI  as a protocol  defines the data transport mechanism in the HTTP protocol  2  Python can be configured to run as a CGI-script in Apache  3  The CGI module in Python offers some convenience functions   Since the HTTP protocol is language-independent  and that Apache s CGI extension is also language-independent  getting the GET and POST parameters should bear only syntax differences across languages   Here s the Python routine to populate a GET dictionary   GET    args os getenv  QUERY STRING   split   amp     for arg in args       t arg split          if len t  gt 1  k v arg split       GET k  v   and for POST   POST    args sys stdin read   split   amp     for arg in args       t arg split          if len t  gt 1  k  v arg split       POST k  v   You can now access the fields as following   print GET get  user id   print POST get  user name     I must also point out that the CGI module doesn t work well  Consider this HTTP request   POST   test py user id 6  user name Bob amp age 30   Using CGI FieldStorage   getvalue  user id   will cause a null pointer exception because the module blindly checks the POST data  ignoring the fact that a POST request can carry GET parameters too

[python] How are POST and GET variables handled in Python?

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