In [9]: summing = True
In [10]: o = '>'
In [11]: sum1 = 0
...: if summing:
...: scode = "sum1+=x; "
...: else:
...: scode = ''
...: fcode = """
...: def checkf (x):
...: {}
...: return x {} s
...:
...: """
...:
...: eval(fcode.format(scode, o))
...:
File "<string>", line 2
def checkf (x):
^
SyntaxError: invalid syntax
In [12]: checkf
---------------------------------------------------------------------------
NameError Traceback (most recent call last)
<ipython-input-12-5b8dbfd36076> in <module>()
----> 1 checkf
NameError: name 'checkf' is not defined