27. variableName

Task

Correct variable names consist only of English letters, digits and underscores and they can’t start with a digit.

Check if the given string is a correct variable name.

Example

• For name = "var_1__Int", the output should be
  variableName(name) = true;

• For name = "qq-q", the output should be
  variableName(name) = false;

• For name = "2w2", the output should be
  variableName(name) = false.

Input/Output

• [execution time limit]
  4 seconds (py3)

• [input] string name
  Guaranteed constraints: 1 ≤ name.length ≤ 10.

• [output] boolean
  true if name is a correct variable name, false otherwise.

My Solution

def variableName(name):
    if name[0].isdigit():
        return False
    valid = [*list(map(str, range(10))), *list(map(chr, [*range(65, 91), *range(97, 123)])), '_']
    return all([letter in valid for letter in name])