What are the skills of Python coding
This article mainly introduces "what are the skills of Python coding". In the daily operation, I believe that many people have doubts about the skills of Python coding. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the questions of "what are the skills of Python coding?" Next, please follow the editor to study!
1 、 isinstance
The isinstance function can be used to determine the type of instance, but its second argument can be a tuple of multiple data types. For example:
Isinstance (x, (int, float))
# is equivalent to
Isinstance (x, int) or isinstance (x, float)
Similar functions include string startswith methods and endswith methods, such as:
S.startswith ('','')
# is equivalent to
S.startswith ("'") or s.startswith (") 2. Share files with http.server # python3
Python3-m http.server
# python2
Python-m SimpleHTTPServer
As shown in the following figure, it is convenient to share files on the local area network through the browser.
3. Zip function implements dictionary key-value pair interchange > lang = {"python": ".py", "java": ".java"}
> dict (zip (lang.values (), lang.keys ()
{'.java': 'java',' .py': 'python'} 4, find the number that appears most frequently in the list [1, 2, 3, 4, 2, 2, 3, 1, 4, 4, 4, 5]
> > max (set (test), key=test.count)
45. Use _ _ slots__ to save memory class MyClass (object):
Def _ _ init__ (self, name, identifier):
Self.name = name
Self.identifier = identifier
Self.set_up ()
Print (sys.getsizeof (MyClass))
> 1016
Class MyClass (object):
_ _ slots__ = ['name',' identifier']
Def _ _ init__ (self, name, identifier):
Self.name = name
Self.identifier = identifier
Self.set_up ()
Print (sys.getsizeof (MyClass))
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