Python uses essays

In the process of using Python encountered a lot of problems, the knowledge point is scattered, through this paper to summarize.

One, Python's Itertools module

Combinations function: Combines the list by a given length.

 from Import  = [1, 2, 3, 4= [] for in range (1, len (seq) +1):    result.append (List ( Combinations (seq, i)))

Results: [(1,), (2,), (3,), (4,), (+), (1,3) ... (1,2,4), ... (1,2,3,4)]

The Product function:

 from Import  = List (product ('abc'xy'= List (product ( Range (3), repeat=2))

result1:[(' A ', ' X '), (' A ', ' Y '), (' B ', ' X '), (' B ', ' Y '), (' C ', ' X '), (' C ', ' Y ')]

result2:[(0,0), (0,1), (0,2), (1,0), (+), (+), (2,0), (2,1), (+ 2,2)]

Second, Python invokes the SOA service, using the Suds module

def Testservice ():     ' WSPL link Address of the service '      = suds. Client.client (URL)    = dict (x='123')    =  Client.service.METHOPNAME (param) Methopname: From the SOA service function name

Third, Python sorts the dictionary elements in the list

Sort_list = [{'datestamp'2017-05'}, {'  Datestamp'2017-04'}]sort_list.sort (Key= Operator.itemgetter ('datestamp'))

Iv. python conversion string encoding format

_str = _str.encode (encoding= ' UTF-8 ', errors= ' strict ')

V. Request data Module requests

When the requested URL requires username and password, you can use the following methods:

Import Requests def get_data (URL):     = requests. Session ()    = (username,  password)  # user name and password    s.headers.update ({'  x-test'true'})    = s.get (URL, headers={'x-test2'true'})    

Python uses essays