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Python: Set the indentation of the first line

Python String: Exercise-29 with Solution

Write a Python program to set the indentation of the first line.

Python String Exercises: Set the indentation of the first line

Sample Solution:-

Python Code:

import textwrap
sample_text ='''
Python is a widely used high-level, general-purpose, interpreted, dynamic
programming language. Its design philosophy emphasizes code readability,
and its syntax allows programmers to express concepts in fewer lines of
code than possible in languages such as C++ or Java.
    '''

text1 =  textwrap.dedent(sample_text).strip()
print()
print(textwrap.fill(text1,
                    initial_indent='',
                    subsequent_indent=' ' * 4,
                    width=80,
                    ))
print()

Sample Output:

Python is a widely used high-level, general-purpose, interpreted, dynamic                                     
    programming language. Its design philosophy emphasizes code readability, and                              
    its syntax allows programmers to express concepts in fewer lines of code                                  
    than possible in languages such as C++ or Java.
	

Flowchart:

Flowchart: Set the indent of the first line

Python Code Editor:

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Python: Tips of the Day

Check if a given key already exists in a dictionary:

In is the intended way to test for the existence of a key in a dict.

d = {"key1": 10, "key2": 23}

if "key1" in d:
    print("this will execute")

if "nonexistent key" in d:
    print("this will not")

If you wanted a default, you can always use dict.get():

d = dict()

for i in range(100):
    key = i % 10
    d[key] = d.get(key, 0) + 1

and if you wanted to always ensure a default value for any key you can either use dict.setdefault() repeatedly or defaultdict from the collections module, like so:

from collections import defaultdict

d = defaultdict(int)

for i in range(100):
    d[i % 10] += 1

but in general, the in keyword is the best way to do it.

Ref: https://bit.ly/2XPMRyz