Python: redirect output to a file

To redirect the standard output to a file by the source code, add this in the beginning of the Python script:

import sys
sys.stdout = open('/path/to/outputfile', 'a')

Python: return multiple values from a function

def op(number1, number2):
    return number1 + number2, number1 - number2, number1 * number2, number1 / number2

add, sub, mul, div = op(10, 5)
print (add, sub, mul, div)

The result:
(15, 5, 50, 2)

Python: a simple HTTP client

  1     import httplib
  2
  3     h = httplib.HTTPConnection('www.python.org')
  4     h.request('GET', '')
  5     r = h.getresponse()
  6
  7     rh = r.getheaders()
  8     print 'Header:'
  9     for i in rh:
 10         print i[0], ':', i[1]
 11     print '\n'
 12
 13     rr = r.read()
 14     print 'Content:'
 15     print rr
 16     print '\n'
 17
 18     h.close()

The httplib module is used to handle the HTTP and HTTPS protocol in Python. Let us look into the code above.

Line 1: Obviously. Import the httplib module.

Line 3: Connect to the HTTP server. If the server is using HTTPS protocol, you use httplib.HTTPSConnection instead.

Line 4: Use the GET method to send the request. You can use the POST method by supplying the first parameter as 'POST' and put your data at the third parameter.

Line 5: Get the response from the server.

Line 7-11: Get and print out the HTTP header of the response.

Line 13-16: Get and print out the content of the response.

Line 18: Close the HTTP connection to the server.