Python全局变量与局部变量详解
#Python中的变量:全局变量和局部变量 #在很多语言中,在声明全局变量的时候,都喜欢把全局变量的名称定义为大写 #定义学生人数为100 STUDENT_NUMBER = 100 #学校名称 SCHOOL_NAME = 'Guangzhou University' """\ 获取全局变量:学生人数STUDENT_NUMBER的值 """ def getStudentNumber(): return STUDENT_NUMBER """\ 重置全局变量:学生人数STUDENT_NUMBER值 """ def setStudentNumber(num): global STUDENT_NUMBER STUDENT_NUMBER = num """\ 获取全局变量:学校名称SCHOOL_NAME的值 """ def getSchoolName(): return SCHOOL_NAME """\ 重置全局变量:学校名称SCHOOL_NAME值 """ def setSchoolName(name): global SCHOOL_NAME SCHOOL_NAME = name def changeValue(): name = '北京大学' number = 90 print('全局变量STUDENT_NUMBER = ' , getStudentNumber()) print('全局变量SCHOOL_NAME = ' , getSchoolName()) print('#######################################') print('局部变量namber = ' , number) print('局部变量name = ' , name) print('#######################################') print('改变全局变量值...') print('#######################################') setStudentNumber(number) setSchoolName(name) print('全局变量STUDENT_NUMBER = ' , getStudentNumber()) print('全局变量SCHOOL_NAME = ' , getSchoolName()) if __name__ == '__main__': changeValue()