How to read text documents in python

There are four ways to read text documents using Python: Read the entire file content directly Read the file content line by line and store it in a list Iterate the file content line by line Specify the encoding, reading mode and newline of the file Symbols and other optional parameters

How to use Python to read text documents

Direct method:

<code class="python">with open("filename.txt", "r") as f:
    contents = f.read()</code>

Read line by line:

<code class="python">with open("filename.txt", "r") as f:
    lines = f.readlines()</code>

Iterate line by line:

<code class="python">with open("filename.txt", "r") as f:
    for line in f:
        # 对每一行进行操作</code>

Other optional parameters :

• encoding: Specify the encoding of the file, such as "utf-8".
• mode: Read mode, "r" is read-only, "w" is write-only, "a" is append.
• newline: is used to control the newline character. The default value is the operating system default newline character.

Example:

Read a file named "example.txt" and print its contents:

<code class="python">with open("example.txt", "r") as f:
    contents = f.read()
print(contents)</code>

Read "example .txt" file and store it in a list:

<code class="python">with open("example.txt", "r") as f:
    lines = f.readlines()
print(lines)</code>

Read the "example.txt" file line by line and print each line:

<code class="python">with open("example.txt", "r") as f:
    for line in f:
        print(line)</code>

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