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.
'''

class Solution(object):
    def isNumber(self, s):
        """
        :type s: str
        :rtype: bool
        """
        s = s.strip()
        try:
            if isinstance(float(s),float) or isinstance(int(s),int):
                return True
        except Exception as e:
            return False

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