I would like to create a dict where the value is a list of tuples
The code below produces a dict with lists of numbers, not list of tuples
mydict = {}
for line in file:
# read a
# read b
# read c
mydict[a] = (b, c) if a not in mydict else mydict[a].append((b, c))
Use defaultdict:
from collections import defaultdict
mydict = defaultdict(list)
for line in file:
a,b,c = line.split() # or something else
mydict[a].append((b,c))
You can also use setdefault when using normal dict's
mydict = {}
mydict.setdefault(a, list()).append((b,c))
