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Linear Algebra
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1. Vectors
2. Matrices
3. Linear equations
4. Matrix determinant
5. Vector space
6. Special matrices
7. Eigenvalues and Eigenvectors
8. Orthogonality
9. Matrix decomposition
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Python File | readline method
schedule Mar 5, 2023
Last updated local_offer
Tags Python
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Python's file.readline(~) method returns one line from the file and leaves a newline character \n at the end of the string (omitted from the last line of the file).
Parameters
1. size | number | optional
The number of bytes from the line to return. Default is to read whole line.
Return value
One line from the file as a string.
Examples
To return the first line of the file as a string:
f = open("test.txt", "r")
# Return the first linef.readline()
'sample line 1\n'
Notice how the newline character \n is included at the end of the string.
If we call file.readline(~) consecutively, we will return consecutive lines from the files:
f = open("test.txt", "r")
# Print first line from the fileprint(f.readline())# Print second line from the file print(f.readline())
sample line 1sample line 2
Published by Isshin Inada
Edited by 0 others
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Official Python Documentation
https://docs.python.org/3/tutorial/inputoutput.html#methods-of-file-objects
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