Also with table of contents about symbols and their usage in Regex

Basics of Regular Expressions in Python, check the link belowπ πRegular Expressions Regex basic in Pythonπ π

you can also use regex to split string. Scroll down for more!!!π π

Python makes regular expressions available through the **re module**.

If you want to check that a string contains only a certain set of characters, in this case a-z, A-Z and 0-9, you can do so like this,

import re def is_allowed(string): characherRegex = re.compile(r'[^a-zA-Z0-9.]') string = characherRegex.search(string) return not bool(string) print (is_allowed("abyzABYZ0099")) # Output: 'True' print (is_allowed("#*@#$%^")) # Output: 'False'

OUTPUT:**TrueFalse**

You can also adapt the expression line from [^a-zA-Z0-9.] to [^a-z0-9.] , to disallow uppercase letters for

example.

**ILLUSTRATION**

## Splitting a string using regular expressions

You can also use regular expressions to split a string. For example,

import re data = re.split(r'\s+', 'James 94 Samantha 417 Scarlett 74') print( data )

**Output:** [ ‘James’, ’94’, ‘Samantha’, ‘417’, ‘Scarlett’, ’74’ ]

**ILLUSTRATION ON CLI**

Replacing Strings using Regex Python

Replacements can be made on strings using re.sub. π π π

Replacing Strings using Regular Expression Regex in Python..-FcukTheCode.com

Replacing strings and Using group referencesReplacements with a small number of groups can be made.

The re.search() methodtakes a regular expression pattern and a string and searches for that pattern within the string. If the search is successful, search() returns a match object or None otherwise.For the second part in using regular expression and searching the stringvisit β>Searching β Regular Expressions (Regex) in Python

**Morae Q!**

- Program to get dictionary items, use update module and items module.
- Regular expression allowing certain set of characters.
- Compute the Sum of Cosine Series.
- Find the Sum of Sine Series.
- Remove the Vowels from the string.
- Find All Non-Overlapping strings/characters using regular expressions .
- Check whether the given string is Panagram or not.
- Replacing strings using Regular Expression Regex.
- Check whether the given number is Strong number or not.
- Find the numbers divisible by a input numbers within the given range.
- Change the behaviour of the Regular Expression using flags.
- Find the exponentiation of a number.
- Find all prime numbers in a range using Sieve of Eratosthenes.
- Convert decimal equivalent into binary, hexadecimal and octal.
- Compute the area of a farmers field in feet.
- Compute time from number of days/hours to seconds.
- Precompiled patterns using Regular Expressions .
- Compute the price of the cake on the nth day.
- Compute the number of possible non-increasing arrays.
- Find the type of spinach using the calorie value.