Python - file to dictionary? -

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i have file comprising 2 columns, i.e.,

1  2 b  3 c

i wish read file dictionary such column 1 key , column 2 value, i.e., 

d = {1:'a', 2:'b', 3:'c'}

the file small, efficiency not issue.

thanks, s.

d = {} open("file.txt") f:     line in f:        (key, val) = line.split()        d[int(key)] = val

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