Conditionals in Python cli with -m oneliner

Sat Apr 9 18:15:53 EDT 2016

gvim wrote:
> Given that this work in a Python 3 repl:
>>>>> import re
>>>> txt = "Some random text"
>>>> if re.search(r"\b\w{4}\b", txt): txt
>>>> 'Some random text'
>> .... and this works on the command line, printing all lines in logs.txt:
>> $ python3 -m oneliner -ne 'line' logs.txt
>> ..... why does this fail:
>> $ python3 -m oneliner -m re -ne 'if re.search(r"\b\w{4}\b", line): line'
> logs.txt
> syntax error in: if re.search(r"\b\w{4}\b", line): line

You seem o be talking about https://pypi.python.org/pypi/oneliner
$ python3 -m oneliner --help
Usage: python -m oneliner [-hvnpdijl] [-m mod] [-e expr] [-s stmt] <path> [<path> ...]
[snip]
 -e expr python expression (see Execution Model)
 -s stmt python statement (see Execution Model)
So you can either use -e with an expression
$ python3 -m oneliner -m re -ne 'line if re.search(r"\b\w{4}\b", line) else ""'
or -s with a statement
$ python3 -m oneliner -m re -ns 'if re.search(r"\b\w{4}\b", line): print(line, end="")'