check if string is number python

txt = "565543"

x = txt.isnumeric()
    
print(x) #this will print out True

>>> 'A'.isdigit()
False
>>> '1'.isdigit()
True

txt = "565543"

x = txt.isnumeric()

    
print(x) 

var.isdigit()
#return true if all the chars in the string are numbers
#return false if not all the chars in the string are numbers

if type(variable) == int or type(variable) == float:
    isNumber = True

txt = "565543"

x = txt.isnumeric()

print(x) 
# Output True if String is all numbers