f1(), f2() lambda functions addition

[micseydel]

I get a different error message than you

Error:
Traceback (most recent call last):
  File "testit.py", line 34, in <module>
    test()
  File "testit.py", line 31, in test
    if equal(f1,f2) == None or abs(equal(f1, f2) - 1) > 10**-7:
  File "testit.py", line 26, in equal
    root = NR(f1()-f2(),diff_param(f1()-f2(),h=0.001))
TypeError: <lambda>() takes exactly 1 argument (0 given)