Python is capitalized words

What is string.capwords() in Python?

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Overview

The capwords() method of the String module in Python capitalizes all the words in a string. It does the following operations:

1. It splits the given string using the split() method.
2. It capitalizes every word using the capitalize() method.
3. It joins the capitalized words into a single string using the join() method.

The method optionally accepts a parameter called sep .

• If a value is specified for the sep parameter, the given separator splits and join the string (Steps 1 and 3).
• If no value is specified for the sep parameter, i.e., if sep is None , the leading and trailing whitespaces are deleted. A single space substitutes the runs of whitespace characters.

Syntax

Parameters

• s : This is the given text/string.
• sep : This is the separator used to split and join the string.

Return value

The capwords() method returns a string where all the words are capitalized.

Code

import string
 
def when_sep_is_none(text):
 
new_str = string.capwords(text)
 
print("When sep parameter is None")
 
print("Original string - " + text)
 
print("After applying capwords method - " + new_str)
 
def when_sep_is_not_none(text, sep_val):
 
new_str = string.capwords(text, sep=sep_val)
 
print("When sep parameter is " + sep_val)
 
print("Original string - " + text)
 
print("After applying capwords method - " + new_str)
 
if __name__ == "__main__":
 
text = "hello educative, how are you?"
 
when_sep_is_none(text)
 
print("--" * 8)
 
sep_val = "a"
 
when_sep_is_not_none(text, sep_val)

Code explanation

• Line 1: We import the string module.
• Lines 4 to 8: We define a method called when_sep_is_none . This applies the capwords() method on the given text with the value for sep as None .
• Lines 10 to 14: We define a method called when_sep_is_not_none . This applies the capwords() method on the given text with a non-none value for sep .
• Lines 17 to 22: We define the main method where we define a text string and the value for sep . We invoke the methods when_sep_is_none and when_sep_is_not_none with the relevant arguments.

Note: When a non-none value is given for the sep parameter, the words are determined based on the sep value.

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How can I test if a string starts with a capital letter using Python?

A string is a collection of characters that can represent a single word or a whole sentence. Unlike Java there is no need to declare Python strings explicitly we can directly assign string value to a literal.

A string in Python is represented by a string class which provides several functions and methods using which you can perform various operations on strings.

In this article, we are going to find out how to test if a string starts with a capital letter using Python.

Using isupper() method

One way to achieve this is using the inbuilt string method isupper(). We should access the first letter of the string using indexing and then send the character to isupper() method, this method returns True if the given character is Capital otherwise, it returns False.

Example 1

In the example given below, we are taking a string as input and we are checking if the first letter is capital or not using the isupper() method.

str1 = "Welcome to Tutorialspoint" print("The given string is") print(str1) print("Checking if the first character is Capital or not") if (str1[0].isupper()): print("The first letter is a capital letter") else: print("The first letter is not a capital letter") 
 

Output

The output of the above example is,

The given string is Welcome to Tutorialspoint Checking if the first character is Capital or not The first letter is a capital letter

Example 2

In the example given below, we are taking the same program as above but we are taking different inputs and checking.

str1 = "welcome to Tutorialspoint" print("The given string is") print(str1) print("Checking if the first character is Capital or not") if (str1[0].isupper()): print("The first letter is a capital letter") else: print("The first letter is not a capital letter") 
 

Output

The output of the above example is,

The given string is welcome to Tutorialspoint Checking if the first character is Capital or not The first letter is not a capital letter

Using Regular Expressions

You can test if a string starts with a capital letter using Python using regular expressions. To use the re library, import it and install it if it isn’t already installed.

We’ll use the regular expression «substring» after importing the re library. With the specified regular expression, the re.search() function checks if the text starts with a capital letter.

Example 1

In the example given below, we are taking a string as an input and we are checking if the first letter of the string is capital or not using Regular Expressions.

import re str1 = "Welcome to Tutorialspoint" print("The given string is") print(str1) print("Checking if the first character is Capital or not") if re.search("^[A-Z]", str1): print("The first letter is a capital letter") else: print("The first letter is not a capital letter") 
 

Output

The output of the above example is,

The given string is Welcome to Tutorialspoint Checking if the first character is Capital or not The first letter is a capital letter

Example 2

In the example given below, we are taking the same program as above but we are taking different input and checking.

import re str1 = "welcome to Tutorialspoint" print("The given string is") print(str1) print("Checking if the first character is Capital or not") if re.search("^[A-Z]", str1): print("The first letter is a capital letter") else: print("The first letter is not a capital letter") 
 

Output

The output of the above example is,

The given string is welcome to Tutorialspoint Checking if the first character is Capital or not The first letter is not a capital letter

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How to Capitalize a String in Python: Upper(), Capitalize(), And More

Today, we’ll be looking at how to capitalize a string in Python. There are a few built-in functions for this problem, but we can also roll our own solution. In short, the `capitalize()`python method exists for this purpose. That said, if you need something a bit different than what this method provides (e.g. only capitalizing the first letter), then you might need to roll your own solution. That said, if you’re looking for a bit more of a description, keep reading.

Table of Contents

Video Summary

With that said, let’s move on to the challenge.

Challenge

For today’s challenge, I had a really fun idea that I might turn into a series. Given how different the `capitalize()`python method is from our solutions, I wonder how hard it would be to duplicate some of the behavior. For example, could you write your own version of the capitalize method that follows the method description?

Return a copy of the string with its first character capitalized and the rest lowercased. Source: Python Documentation

If you’d like to share a solution, feel free to use #RenegadePython on Twitter, and I’ll give it a share!

A Little Recap

# A capitalize function leveraging character values def capitalize_ascii(string): character = string[0] if 97 

Likewise, here are a few python resources from the folks at Amazon (#ad):

Effective Python: 90 Specific Ways to Write Better Python
Python Tricks: A Buffet of Awesome Python Features
Python Programming: An Introduction to Computer Science

Once again, thanks for stopping by. I hope this article was helpful!
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Jeremy grew up in a small town where he enjoyed playing soccer and video games, practicing taekwondo, and trading Pokémon cards. Once out of the nest, he pursued a Bachelors in Computer Engineering with a minor in Game Design. After college, he spent about two years writing software for a major engineering company. Then, he earned a master's in Computer Science and Engineering. Today, he pursues a PhD in Engineering Education in order to ultimately land a teaching gig. In his spare time, Jeremy enjoys spending time with his wife, playing Overwatch and Phantasy Star Online 2, practicing trombone, watching Penguins hockey, and traveling the world.
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