10 useful python tips and tricks for programmers

Python is one of the most used programming languages all over the world because of its features and easy to learn syntax. It is an open-source language that supports almost all the major platforms including Windows, Linux, and Mac.

For a beginner in programming, it is a good language to start with. The modern use of python includes machine learning and data science. The latest version of the python is 3.8 and python 3.9 is in the development stage.

Some of the large organizations are already making the use of python for developing quality products. Google, NASA, Yahoo, Quora, Pinterest and many more are there. To make the learning easy for you, we are presenting a few tips and tricks python programming. You must have a basic knowledge of python programming to use them properly

Merging dictionaries

Learning to merge dictionary is an important python tips and tricks. You can merge a dictionary by unpacking them. Unpacking will be done in a new dictionary

>>> x = {'a’: 1} >>> y = {'b': 2} >>> z = {**x, **y, 'w': 4} >>> z

Output

{'a': 1, 'b': 2, 'w': 4}

Swapping Variables

For swapping two variables in the right way, you can use multiple assignments. There is no need to use any temporary variable.

>>> a, b= 2, 8 >>> a, b = b, a >>> print(a,b)

Output

8 2

Chained Comparison

You can check more than two conditions in python with the help of a chained comparison operator. Comparison gives Boolean values- true or false.

>>>a = 5 >>>print(1 < a < 10) >>>print(10 < a < 25 ) >>>print(a < 10 < a*10 < 100) >>>print(10 > a <= 9) >>>print(5 == a > 4)

Output

Output True False

Multiple Assignment

>>> a, *b, c = 3, 4, 5, 6 >>> a >>> b >>> c

Output

>>> a, *b, c = 3, 4, 5, 6 >>> a >>> b >>> c

Joining Strings

Use str.join() method for joining multiple strings that have the similar character or group of characters

>>> d = ['a', 'b', 'c'] >>> e = '-*-'.join(d)

Output

'a-*-b-*-c'

Iteration

For iterating through a sequence and getting output in the reversed order

>>>for item in reversed(['a', 'b', 'c']): ... print(item)

Output

c b a

Aggregating elements

The easiest way of aggregating elements is by using zip. Also, you can transform it into a list or tuple.

>>> a = [3, 5, 6] >>> b = ('x', 'y', 'z') >>> c = zip(a, b) >>> c >>> list(z)

Output

<zip object at 0x0000026454F48688> [(3, 'x'), (5, 'y'), (6, 'z')]

Transposing Matrices

You can use zip to get the transpose of a matrix instead of apply the NumPy library

>>> x = [(3, 5, 7), ('a', 'b', 'c’)] >>> y = zip(*x) >>> z = list(y) >>> z

Output

[(3, 'a'), (5, 'b'), (7, 'c')]

Sorting Sequences

By default, the sorting of sequences is done by their first element

>>> x = (2, 'a') >>> y = (3, 'b') >>> z = (4, 'c') >>> sorted([x, y, z])

Removing duplicates

Get unique values from a list by removing duplicates by converting to a set

>>> a = [3, 4, 2, 4, 9] >>> b = set(a) >>> b >>> c = list(b) >>> c

Output

{9, 2, 3, 4} {9, 2, 3, 4}

Use these python tips and tricks to make yourself productive while programming in python. These will help in writing much better codes