day23_5_练习_Calculator_使用正则表达式计算复杂表达式

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# ------------------------------------------------------------
# ******************** day23_5_Calculator_使用正则表达式计算复杂表达式 *******************
# ******************** day23_5_Calculator_使用正则表达式计算复杂表达式 *******************
# =====>>>>>>内容概览
# =====>>>>>>内容概览

# ------------------------------------------------------------
# # 1、逐个测试
# # # 测试内容#a = "1 - 2 * ( (60-30 +(-40/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4-3)/ (16-3*2) )"
# ------------------------------------------------------------

# ------------------------------------------------------------
# # 2、完成对等式的基本计算
# # # 测试内容#a = "1 - 2 * ( (60-30 +(-40/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4-3)/ (16-3*2) )"
# ------------------------------------------------------------

# ------------------------------------------------------------
# # 3、实现交互式等式计算
# # # 测试内容 a = "1 - 2 * ( (60-30 +(-40/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4-3)/ (16-3*2) )"
# ------------------------------------------------------------

# ------------------------------------------------分割线-------------------------------------------------
# ------------------------------------------------分割线-------------------------------------------------
# ------------------------------------------------分割线-------------------------------------------------

"""
# ------------------------------------------------------------
# # 1、逐个测试
# # # 测试内容#a = "1 - 2 * ( (60-30 +(-40/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4-3)/ (16-3*2) )"
# ------------------------------------------------------------
"""
# =====>>>>>>内容概览
# =====>>>>>>内容概览
# import re
#
# a = "1 - 2 * ( (60-30 +(-40/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4-3)/ (16-3*2) )"
# # print(eval(a))
#
# a = a.replace(" ","")
#
# # 取出内容
# re_tmp = re.search("([^()]+)", a)
# tmp = eval(re_tmp.group())
# a = a.replace(re_tmp.group(),str(tmp))
# #
# # # # +-连续处理
# # # re_tmp  = re.search("(+-)", a)
# # # a = a.replace(re_tmp.group(),"-")
#
# # a = 1-2*((60-30-8.0*(9-2*5/3+7/3*99/4*2998+10*568/14))-(-4-3)/(16-3*2))
# re_tmp = re.search("([^()]+)", a)
# tmp = eval(re_tmp.group())
# a = a.replace(re_tmp.group(),str(tmp))
#
# # a = 1-2*((60-30-8.0*173545.88095238098)-(-4-3)/(16-3*2))
# re_tmp = re.search("([^()]+)", a)
# tmp = eval(re_tmp.group())
# a = a.replace(re_tmp.group(),str(tmp))
#
# # a = 1-2*(-1388337.0476190478-(-4-3)/(16-3*2))
# re_tmp = re.search("([^()]+)", a)
# tmp = eval(re_tmp.group())
# a = a.replace(re_tmp.group(),str(tmp))
#
# # a = 1-2*(-1388337.0476190478--7/(16-3*2))
# re_tmp = re.search("([^()]+)", a)
# tmp = eval(re_tmp.group())
# a = a.replace(re_tmp.group(),str(tmp))
#
# # a = 1-2*(-1388337.0476190478--7/10)
# re_tmp = re.search("([^()]+)", a)
# tmp = eval(re_tmp.group())
# a = a.replace(re_tmp.group(),str(tmp))
#
# # a = 1-2*-1388336.3476190479
# re_tmp = re.search("([^()]+)", a)
# # tmp = eval(re_tmp.group())
# # a = a.replace(re_tmp.group(),str(tmp))
#
# print("re_tmp.group():  ",re_tmp)
# # print("re_tmp.group():  ",re_tmp.group())
# # print(a_2.group())
# print("tmp:             ",tmp)
# print("a:               ",a)






"""
# ------------------------------------------------------------
# # 2、完成对等式的基本计算
# # # 测试内容#a = "1 - 2 * ( (60-30 +(-40/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4-3)/ (16-3*2) )"
# ------------------------------------------------------------
"""
#
# import re
#
# a = "1 - 2 * ( (60-30 +(-40/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4-3)/ (16-3*2) )"
# a = a.replace(" ","")
# while True:
#     a = a.replace(" ","")
#     # 取出内容
#     re_tmp = re.search("([^()]+)", a)
#     # if not re_tmp :
#     if re_tmp == None:
#         a =  eval(a)
#         break
#     tmp = eval(re_tmp.group())
#     a = a.replace(re_tmp.group(),str(tmp))
#
# print("re_tmp():  ",re_tmp)
# print("tmp:             ",tmp)
# print("a:               ",a)
#
#





"""
# ------------------------------------------------------------
# # 3、实现交互式等式计算
# # # 测试内容 a = "1 - 2 * ( (60-30 +(-40/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4-3)/ (16-3*2) )"
# ------------------------------------------------------------
"""
#
# import re
# flag_input = False
# flag_continue = False
# while True:
#     while not flag_input:
#         a = input("Please enter the expression to be evaluated:")
#         # print(re.search("[^0-9+-*/() ]", a))
#         if re.search("[^0-90+-*/() ]", a) == None:
#             # print("输入正确")
#             flag_input = True
#             # 去空格
#             a = a.replace(" ", "")
#             break
#         else:
#             print("输入错误")
#             continue
#
#     # 取出内容
#     re_tmp = re.search("([^()]+)", a)
#     # None说明是最后一次等式
#     if re_tmp == None:
#         a =  eval(a)
#         print("计算结果:               ", a)
#         if input("If continue,please input continue; And input any world to exit!") =="continue":
#             flag_input = False  # 开启输入标志
#             continue
#         else:
#             break
#     tmp = eval(re_tmp.group())
#     a = a.replace(re_tmp.group(),str(tmp))
#