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Read File Into Dictionary in Python

Created: October-14, 2021

1. Use the carve up() Function to Read a File Into a Dictionary in Python
2. Use the strip() Function Along With the split() Function to Read a File Into a Dictionary in Python
3. Apply Dictionary Comprehension to Read a File Into a Dictionary in Python
4. Utilize pandas Library to Read a File Into a Dictionary in Python

File handling is a vital role of the development and maintenance of whatsoever web awarding. Similar other popular programming languages, Python is perfectly capable of supporting file handling. It allows the users to operate on different types of files while carrying some bones operations similar reading and writing forth with the other mainstream operations.

This tutorial demonstrates the different ways to read a file into a dictionary in Python.

For reference, nosotros will be using a text file in the code to explain the different methods used in the article.

Contents of the file File1.txt:

              4 x 5 y 6 z                          

Use the split() Function to Read a File Into a Dictionary in Python

The split() role is generally utilized to chop a given string into a listing.

The following code uses the split() function to read a file into a dictionary in Python.

              a = {} with open("File1.txt") as f:     for line in f:        (k, v) = line.split()        a[int(thou)] = v print(a)                          

The in a higher place code provides the following output:

              {four: 'ten', 5: 'y', 6: 'z'}                          

Explanation:

• An empty lexicon a is created kickoff.
• The open() function is utilized to open up and read from the given file File1.txt
• The contents of the file are read line by line.
• The line contents are then chopped using the separate() function at space character. The grapheme before the space is taken every bit the key while the character later the infinite is taken as the value of the dictionary.
• The for loop is utilized for the iteration purpose and for reaching the end of the file.

Use the strip() Function Along With the split() Function to Read a File Into a Lexicon in Python

The strip() function in Python removes whatsoever particularly specified characters or bare spaces at the beginning and the end of a string. The function returns a new string instead of making changes to the original 1.

The following code uses the strip() role and the split() office to read a file into a dictionary in Python.

              with open('File1.txt') as f:   a = dict(i.rstrip().split(None, i) for i in f) print(a)                          

The in a higher place code provides the following output:

              {four: 'ten', 5: 'y', 6: 'z'}                          

Explanation:

• An empty lexicon a is created beginning.
• The open() office is utilized to open up and read from the given file File1.txt
• The contents of the file are read line by line.
• The line contents are then chopped using the split() function at space character. The strip() role is also utilized within the same to remove mentioned characters.
• The for loop is utilized for the iteration purpose and for reaching the terminate of the file.

Use Lexicon Comprehension to Read a File Into a Dictionary in Python

The dictionary comprehension is a syntactical extension of the much popular and used listing comprehension.

While dictionary comprehension is syntactically deployed similarly to list comprehension in the Python lawmaking, information technology has a big difference as the former produces the output as a lexicon, unlike the latter, which provides a list as an output.

The following code uses the lexicon comprehension to read a file into a dictionary in Python.

              with open up("File1.txt") equally f:     a = {int(k): v for line in f for (m, v) in [line.strip().carve up(None, 1)]} print(a)                          

The above code provides the following output:

              {4: 'ten', 5: 'y', 6: 'z'}                          

Use pandas Library to Read a File Into a Dictionary in Python

Pandas is a library provided by Python that is utilized for information analysis and manipulation. Pandas is an open-source, like shooting fish in a barrel-to-utilise, and flexible library.

The following code uses the pandas library to read a file into a dictionary in Python.

              import pandas equally pd  a = pd.read_csv("File1.txt", delimiter=" ", header = None).to_dict()[0] print(a)                          

The above code provides the following output:

              {4: 'ten', 5: 'y', 6: 'z'}                          

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