Python

# Python: File Handling

# Lesson Learn

  • There are two types of files in computer.

    • Binary File: .exe .bin .xlsm (from Microsoft Excel) .docx (from Microsoft Word) .pdf .jpg
    • Text File: .txt .csv .py and more

  • Therefore, we will learn how to handle Text File in Python.

# Open file for reading

# project structure

+-- some-folder
|    +-- text.txt
|    +-- main.py
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text.txt

Hello
World
1234
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main.py

with open("text.txt","r") as read_file:
    while True:
        data_eachline = read_file.readline()
        if data_eachline == "":
            break
        print(data_eachline)
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OUTPUT

Hello


World


1234

or

main.py

all_data = None
with open("text.txt","r") as read_file:
    all_data = read_file.readlines()       
print(all_data)
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OUTPUT

['Hello\n', 'World\n', '1234']

# Open file for writing

# project structure

+-- some-folder-2
|    +-- main.py
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with open("new-file.txt","w") as write_file:
    write_file.write("Hello")
    write_file.write("World\n")
    write_file.write("555")
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OUTPUT

+-- some-folder-2
|    +-- main.py
|    +-- new-file.txt
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open new-file.txt

HelloWorld
555
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