関連ワード:  python check if a string represents a number    python check if a string is a number    python check if a string is a number or float    python determine if a string is a number    python check if a string is a int    python check if a string is a negative number    python check if a string is a hex number    python check if a string is a decimal number    python check if a string is a valid number    python check if string is a number including negatives  
結果 : python check if a string represents a number