65.py

'''
 Validate if a given string is numeric.

 Some examples:
 "0" => true
 " 0.1 " => true
 "abc" => false
 "1 a" => false
 "2e10" => true

 Note: It is intended for the problem statement to be ambiguous. You should gather all requirements up front before implementing one.
'''

classSolution(object):
defisNumber(self, s):
"""
 :type s: str
 :rtype: bool
 """
s=s.strip()
try:
ifisinstance(float(s),float) orisinstance(int(s),int):
returnTrue
exceptExceptionase:
returnFalse

# Time: O(1)
# Space: O(1)