Python File readline() Method
Example
Read the first line of the file "demofile.txt":
f = open("demofile.txt", "r")
print(f.readline())
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Definition and Usage
The readline() method returns one line from the file.
You can also specified how many bytes from the line to return, by using the size parameter.
Syntax
file.readline(size)
Parameter Values
| Parameter | Description |
|---|---|
| size | Optional. The number of bytes from the line to return. Default -1, which means the whole line. |
More examples
Example
Call readline() twice to return both the
first and the second line:
f = open("demofile.txt", "r")
print(f.readline())
print(f.readline())
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Example
Return only the five first bytes from the first line:
f = open("demofile.txt", "r")
print(f.readline(5))
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