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#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
import click
 
 
@click.group()
def cmd():
    pass
 
 
@cmd.command()
@click.option('--name', '-n', default='world', help='ここに説明')
def english(name):
    print(f'Hello, {name}!')
 
 
@cmd.command()
@click.option('--name', '-n', default='sekai', help='ここに説明')
def japanese(name):
    print(f'Konnichiwa, {name}!')
 
 
def main():
    cmd()
 
 
if __name__ == '__main__':
    main()

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python2.7/py_compile.py", line 117, in compile
    raise py_exc
py_compile.PyCompileError:   File "prog.py", line 15
    print(f'Hello, {name}!')
                          ^
SyntaxError: invalid syntax

Standard output is empty