If strict is false (True is the default), then control characters will be allowed inside strings.
Control characters in this context are those with character codes in the 0–31 range, including '\t' (tab), '\n', '\r' and '\0'.
如果strict為false(默認值為True),則字符串中允許使用控制字符。此上下文中的控制字符是那些字符代碼在0–31范圍內的字符,包括“\t”(制表符)、“\n”、“r”和“\0”。