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Python Tips and Tricks

 4 years ago
source link: http://uzairadamjee.com/blog/python-tips/
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Python Tips and Tricks
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Python Tips and Tricks

July 21, 2020 uzairadamjee 0 Comments

Python is a beautiful language. It is an interpreted, high-level, general-purpose programming language. Python is dynamically typed and garbage-collected. It supports multiple programming paradigms, including structured (particularly, procedural), object-oriented, and functional programming.

Following are the python tips and tricks every Python programmer should know.

  • Create a single string from all the elements in list
a = ["My", "name", "is", "Uzair"] 
print(" ".join(a))
  • Return Multiple Values From Functions
def x(): 
    return 1, 2, 3, 4
a, b, c, d = x() 
  
print(a, b, c, d)
  • Find The Most Frequent Value In A List
test = [1, 2, 3, 4, 2, 2, 3, 1, 4, 4, 4] 
print(max(set(test), key = test.count))
  • Swap Variables In-Place
temp = x
x = y
y = temp

## OR

x, y = 8, 10
print(x, y)
x, y = y, x
print(x, y)
  • Returning multiple values from a function
def get_multi_string():
    x = "Karachi"
    y = "Pakistan"
    z = 5
    return x, y, z
var = get_multi_string()
(x,y,z) = var
  • Assigning multiple values in multiple variables
x, y = 10, 20
  • Concatenate Strings 
print('Python' + ' Coding' + ' Tips')
  • Reverse a string 
name = "Uzair"
name[::-1]
  • Merging dictionaries
x = {'a': 1, 'b': 2}
y = {'b': 3, 'c': 4}
z = {**x, **y}
  • Iterating over a dictionary
m = {'a': 1, 'b': 2, 'c': 3, 'd': 4} 
for key, value in m.items():
    print('{0}: {1}'.format(key, value))
  • Iterating over list values while getting the index too
m = ['a', 'b', 'c', 'd']
for index, value in enumerate(m):
    print('{0}: {1}'.format(index, value))
  • Initializing empty collections
lst = list()
dic = dict()
s = set()
  • Removing useless characters at the end of string
str1 = "  Hello world   "
str2 = "hello///"
str1.strip() 
str2.strip("/")
  • Removing duplicates items from a list
listNumbers = [1, 10, 10, 2, 2, 1, 5, 10, 20,30,50,20,100]
print("Original= ", listNumbers)

listNumbers = list(set(listNumbers))
print("After removing duplicate= ", listNumbers)
  • The enumerate() function adds a counter to an iterable object.
subjects = ('Python', 'Coding', 'Tips')

for i, subject in enumerate(subjects):
    print(i, subject)
  • A set of strings and perform search in set using IF 
objects = {"python", "coding", "tips", "for", "beginners"}

# Print set.
print(objects)
print(len(objects))

# Use of "in" keyword.
if "tips" in objects:
    print("Found")

# Use of "not in" keyword.
if "test" not in objects:
    print("Not Found")

Thank you for reading.

I hope you found this article useful! If there are tips you think I should have included or other suggestions then please do comment.

Happy coding!


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