The difference between functools.partial and lambdas

>>> def echo(s):
...   print s
...
>>> funcs = []
>>> for i in range(3):
...   funcs.append(lambda: echo(i))
...
>>> for func in funcs:
...   func()
...
2
2
2
>>> funcs = []
>>> for i in range(3):
...   funcs.append(partial(echo, i))
...
>>> for func in funcs:
...   func()
...
0
1
2

echo = lambda x: print(x)
funcs = []
for i in range(3):
    funcs.append((lambda i: lambda: echo(i))(i))
for f in funcs:
    f()
#>
# 0
# 1
# 2