Applet 3: Read the file and print it out, if not present, prompt error message

The implementation code is as follows:

Attention:

1. String formatting

Print (' I ' m%s. I ' m%d year old '% (' Zhu ', 24)) is a template. %s is the first format character, which represents a string. %d is the second format character, which represents an integer. (' Zhu ', 24) Two elements replace the values of%s and%d, respectively

Print ("I ' m% (name) s. I ' m% (age) d years old "% {' name ': ' Zhu ', ' Age ': 24}) use a dictionary to pass real values. Two format characters are named. The name is used () enclosed. One key for each named corresponding dictionary

2. Abnormal

Multiple exceptions can be thrown in a try statement block try,,except,,except

else if no exception is thrown in the try block, the ELSE clause is executed

A finally clause, which is bound to be executed, regardless of whether an exception occurs in a try clause; the finally clause is commonly used at the end of a program to close a file or network socket

Applet 3: Read the file and print it out, if not present, prompt error message