Split list item and remove split items if both are not contained in another list in Python -


i have list, called nwk, 2 values in each row. use split() separate values of each row, , compare both of values list of integers, called vals. if both of values in row in nwk not contained in vals, remove row nwk. here have far:

for line in nwk:     = [ (int(n) n in line.split()) ]     if a[0] not in vals:         nwk.remove(line)     else:         if a[1] not in vals:             nwk.remove(line)         else:             continue

however, when print nwk, code has merely removed 1/2 of original lines in nwk, know incorrect. how may fix this? thank in advance help.

filter friend:

filter(lambda line: any(elem in vals elem in line.split()), nwk)

nice readings:

  • the python language reference » filter()
  • the python language reference » all() / any()
  • the python language reference » lambdas

test:

>>> nwk = ['1 2', '3 4', '5 6', '7 8'] >>> vals = ['1', '2', '5', '6', '8'] >>> list(filter(lambda line: any(elem in vals elem in line.split()), nwk)) ['1 2', '5 6', '7 8'] >>>

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