Reason for error: Reason: Windows can use \ to read files, but \ is used as an escape character in a string. After escaping, the resource of the path may not be found. For example, \t will be escaped as tab key
solution:
1. Replace it with an absolute path:
func1("C:\\Users\\renyc")
2. Explicitly declare the string without escaping (add r)
func1(r"C:\Users\renyc")
3. Use the Linux path /
func1("C:/Users/renyc")