python cheat sheet
Best Python Cheat Sheet PDF:
https://websitesetup.org/wp-content/uploads/2020/04/Python-Cheat-Sheet.pdfpython cheat sheet
Best Python Cheat Sheet PDF:
https://websitesetup.org/wp-content/uploads/2020/04/Python-Cheat-Sheet.pdfimport os in python meaning
import os
Executing a shell command
os.system()
Get the users environment
os.environ()
#Returns the current working directory.
os.getcwd()
Return the real group id of the current process.
os.getgid()
Return the current process’s user id.
os.getuid()
Returns the real process ID of the current process.
os.getpid()
Set the current numeric umask and return the previous umask.
os.umask(mask)
Return information identifying the current operating system.
os.uname()
Change the root directory of the current process to path.
os.chroot(path)
Return a list of the entries in the directory given by path.
os.listdir(path)
Create a directory named path with numeric mode mode.
os.mkdir(path)
Recursive directory creation function.
os.makedirs(path)
Remove (delete) the file path.
os.remove(path)
Remove directories recursively.
os.removedirs(path)
Rename the file or directory src to dst.
os.rename(src, dst)
Remove (delete) the directory path.
os.rmdir(path)python cheat sheet
print('Hello World') # print
string_name = "This is a string" # string
string_name[5:] # slicing returns "is a string"
integer_name = 4 # integer
float_name = 3.0 # float
list_name = ['a','b','cats','dogs', 1, 2.0] # list
list_name.append(3) # add to list
# list comprehension filters for int types from the previous list
list_comp = [x for x in list_name if type(x) is int]
# dictionary
dic = {"Bob":9766692343,"Alice":6123336678}
dic["Alice"] # returns 6123336678
dic_phone_numbers = dic.values() # returns list of values
dic_names = dic.keys() # returns list of keys
# class (cat object with 9 lives)
class Cat:
def __init__(self,name):
self.name = name
self.lives = 9
print(f"{name} is a cat!")
# recursive function (factorial example)
def factorial(x):
if x == 1:
return 1
else:
return (x * factorial(x-1))cheat sheet python
>>> import this
The Zen of Python, by Tim Peters
Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
Although never is often better than *right* now.
If the implementation is hard to explain, it's a bad idea.
If the implementation is easy to explain, it may be a good idea.
Namespaces are one honking great idea -- let's do more of those!cheat sheet python
>>> 2 + 3 * 6
20cheat sheet python
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