字串
頭前 轉厝 後壁字串基本操作
裁剪(strip, lstrip, rstrip)
分割(split, rsplit, partition, rpartition)
計數(count)
首尾字串(startswith, endswith)與尋找(find, rfind, index, rindex)
大小寫轉換(upper, lower, swapcase, isupper, islower, capitalize, casefold) pyfile4.py
判斷內容(isalpha, isdecimal, isdigit, isnumeric,isalnum, isspace)
置中(CENTER)
填滿(zfill, ljust, rjust)
加入(join)
轉換(maketrans,translate)與代換(replace)
