open file in read mode python code example
Example 1: python file open modes
r for reading
r+ opens for reading and writing (cannot truncate a file)
w for writing
w+ for writing and reading (can truncate a file)
rb for reading a binary file. The file pointer is placed at the beginning of the file.
rb+ reading or writing a binary file
wb+ writing a binary file
a+ opens for appending
ab+ Opens a file for both appending and reading in binary. The file pointer is at the end of the file if the file exists. The file opens in the append mode.
x open for exclusive creation, failing if the file already exists (Python 3)
Example 2: python open file
with open('filename', 'a') as f:
f.write(var1)
f.write('data')
f.close()
with open('filename', 'r') as f:
with open('filename', 'x') as f:
with open('filename', 't') as f:
with open('filename', 'b') as f:
with open('filename', 'w') as f:
with open('filename', '+') as f: