Python全局变量与局部变量详解
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()
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