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file parameter in Python with print() function
By IncludeHelp Last updated : December 08, 2024
The 'file' parameter in printf() function
'file' parameter is used with print() function to write the value of given arguments to the specified file. If it is not specified, by default the value is written to system.stdout.
It can be used to create log the values i.e. to keep the track to the statements, logics, etc.
We can use two ways,
- Writing to the sys.stderr
- Writing to the external file
Note: "file" is available in Python 3.x or later versions.
Syntax
print(argument1, argument2, ..., file = value)
Examples
Example 1: Printing to stderr
# Python code for printing to stderr
# importing the package
import sys # for sys.stderr
# variables
name = "Mike"
age = 21
city = "Washington, D.C."
print("printing to stderr...")
print(name, age, city, file=sys.stderr)
Output
printing to stderr...
Mike 21 Washington, D.C.
Note: In the output, "printing to stderr..." will be printed as standard output and "Mike 21 Washington, D.C." will be printed as error.
Example 2: Printing to an external file
# Python code for printing to file
# open the file in write mode
obj_file = open("logs.txt", "w")
# variables
name = "Mike"
age = 21
city = "Washington, D.C."
print("printing to a file...")
print(name, age, city, file=obj_file)
# closing the file
obj_file.close()
Output
printing to a file...
logs.txt:
Mike 21 Washington, D.C.