関連ワード:  python remove all letters from a string    python remove all characters from a string    python remove all non letters from a string    python remove all special characters from a string    python remove all characters from string except numbers    python strip all letters from string    python remove any letters from string    python remove all characters from string except    python remove all characters from string except numbers and dots    python remove all non alphanumeric characters from a string  
結果 : python remove all letters from a string