The main method involved in the article is open(filename,'r') in Python to open the file in reading open(filename,'w') to open the file in writing. We use for * in * to read the data in the file Or write file data and use the dict(eval(list2)) method to convert the string into a dictionary. The
detailed code is as follows
# 刘文豪
# 大帅哥
import math
import re
def main(): # Main function
select = True
while (select):
menu()
start_int = input("Please select the serial number of the function you want to operate:")
if start_int = = "12":
select = False
print("You have already exited the system and welcome to come next time")
elif start_int == "4":
insert()
elif start_int == "5":
login()
elif start_int == "6 ":
show()
elif start_int == "11":
delete()
elif start_int == "7":
revise()
elif start_int == "8":
deposit()
elif start_int == "9":
getMoney()
elif start_int == "10":
UseMoney()
def menu(): # Menu display
print("1========Bank deposit and withdrawal system=== =====")
print("2===========================")
print("3====== =====Function menu===========")
print("4=========Register personal information==========")
print( "5============Login=============")
print("6=========Query personal information==== ======")
print("7=========Modify personal account==========")
print("8========== ==Save money=============")
print("9============Withdraw money============= ")
print("10=========Display annual income==========")12===========Exit=============")
filename = "Bank.txt" # Define the file name for saving user information)
print("11========Cancel personal information==========")
print("12===========Exit=============")
deposit = int(input("Enter the amount you want to deposit"))
def save(Bank): # Create file method
try:
Bank_txt = open(filename, "a")
except Exception as e:
Bank_txt = open(filename, "w")
for info in Bank:
Bank_txt.write(str(info) + "\n")
Bank_txt.close()
def insert(): # Registration method
BankList = [] # Save user information list
mark = True # Whether to continue adding
while mark:
id = input("Please enter your ID password ( Such as 1001): ")
if not id:
break
name = input("Please enter your name")
if not name:
break
try:
break
except:
if deposit == 0:
print("The input is invalid, not an integer, please re-enter")
continue
Bank = {"id": id, "name": name, "deposit": deposit}
BankList.append(Bank)
mark = False
save( BankList)
print("Registered successfully")
global g_select
g_select = 0
global Username
global Userpassword
def login(): # Login method
global Username
global g_select
global g_BankQuery
global Userpassword
g_BankQuery = []
Username = str(input("Please enter your user Name"))
Userpassword = str(input("Please enter your password"))
file = open(filename,'r')
Bank = file.readlines() # read all content
for list in Bank:
d = dict(eval(list)) # Characters are converted into a dictionary
if d['name'] == Username and d['id'] == Userpassword:
g_BankQuery.append(d)
print("Login successful!")
g_select = 1
else:
pass
if not g_BankQuery:
g_select = 0
print("Login failure, please register first!")
else:
pass
def show(): # Query personal information
if g_select == 1:
format_title = "{:^6}{ :^12}"
print(format_title.format("name", "deposit"))
format_date = "{:^6}{:^12}"
for info in g_BankQuery :
print(format_date.format(str(info.get('name') ), str(info.get('deposit'))))
else:
print("Please login first!")
def delete(): # Delete personal account method
global g_BankQuery
cz = []
global g_select
choose = 0
if g_select == 1:
while choose <3:
username = str(input("Please enter your name"))
userpassword = str( input("Please enter your password"))
file = open(filename,'r')
Bank = file.readlines() # read all content
for list in Bank:
for list2 in Bank:
d2 = dict(eval(list2)) # Characters are converted to dictionaries
d = dict(eval(list)) # characters are converted to dictionary
if d['name' ] == username and d['id'] == userpassword:
cz.append(d)
file.close()
choose = 3
NewBank = open(filename,'w') # Open the file by writing
if d2['name'] != username and d2['id'] != userpassword:
NewBank.write( str(d2) + "\n")
else:
pass
else:
pass
if not cz:
choose = choose + 1
if choose == 3:
g_select = 0
print("Please log in again!")
else:
print("Username Or the password is wrong, please re-enter you still have:"+ str(3-choose) + "opportunity")
else:
for list2 in Bank:
g_BankQuery.clear()
g_select = 0
print("Your personal information has been cancelled")
else:
print("Please log in first!")
def revise(): # Modify personal account method
cz = []
global g_select
if g_select == 1:
username = input("Please enter your username:")
userpassword = input ("Please enter your password:")
file = open(filename,'r')
Bank = file.readlines() # read all contents
for list in Bank:
d = dict(eval(list)) # characters are converted to Dictionary
if d['name'] == username and d['id'] == userpassword:
cz.append(d
)
file.close () NewBank = open(filename,'w') # Open the file by writing
d2 = dict(eval(list2)) # characters are converted into dictionaries
if d2['name'] == username and d2['id'] == userpassword:
d2['name'] = input("Enter your new name ：")
d2['id'] = input("Enter your new password:")
NewBank.write(str(d2) + "\n")
print("Modified successfully, please log in again!")
g_select = 0
else:
NewBank.write(str(d2) + "\n")
else:
pass
if not cz:
print("The password or username you entered is incorrect, please log in again")
g_select = 0
else:
pass
else:
print("Please log in first!")
if d2 ['name'] == Username and d2['id'] == Userpassword:
)
def deposit(): #
Deposit method global g_BankQuery
global g_select
cz = []
if g_select == 1:
money = int(input("Please enter how much money you want to deposit:"))
file = open(filename,'r')
Bank = file.readlines() # read All content
for list in Bank:
d = dict(eval(list)) # Characters are converted to dictionaries
if d['name'] == Username and d['id'] == Userpassword:
cz.append(d)
file. close()
NewBank = open(filename,'w') # Open the file by writing
for list2 in Bank:
d2 = dict(eval(list2)) # Convert characters into a dictionary
NewBank.write(str(d2) + "\n")
d2['deposit'] = str(int(d2['deposit']) + money)
print("Save successfully!")
g_BankQuery.clear()
g_BankQuery.append(d2)
else:
NewBank.write(str(d2) + "\n")
else:
pass
else:
print("Please login first!")
def getMoney(): #
Withdraw money method global g_select
global g_BankQuery
cz = []
if g_select == 1:
money = int(input(" Please enter how much money you want to withdraw:"))
file = open(filename,'r')
Bank = file.readlines() # read all content
for list in Bank:
d = dict(eval(list)) # characters are converted to dictionary
if d['name'] == Username and d['id'] == Userpassword:
cz.append(d)
if money> int(d['deposit']):
print("Your balance is insufficient")
else:
file.close
() NewBank = open(filename,'w') # Open the file by writing
for list2 in Bank:
d2 = dict(eval(list2)) # Characters are converted to dictionaries
if d2['name'] == Username and d2['id '] == Userpassword:
d2['deposit'] = str(int(d2['deposit'])-money)
NewBank.write(str(d2) + "\n")
print(" Withdraw money successfully!")
g_BankQuery.clear()
Withdraw g_BankQuery.append(d2)
else:
NewBank.write(str(d2) + "\n")
else:
pass
else:
print("Please log in first!")
def UseMoney(): # Interest calculation
UM = True
while UM:
try:
money = float(input( "Please enter how much money you want to invest in financial management:"))
year = int(input("Please enter how many years you want to store:"))
except:
print("Please enter an integer year!")
if 0 <year < = 3:
profitmargin = 0.03
elif 3 <year <= 5:
profitmargin = 0.04
elif 5 <year <= 10:
profitmargin = 0.08
if money < 0 or year <= 0:
profitmargin = 0.06
elif year> 10:
if __name__ =="__main__ ":
print("Your principal cannot be less than 0 yuan or the year cannot be less than 0 years")
else:
UM = False
profit = round(money * year * profitmargin, 3)
print("You save:" + str(year) + "The annual profit will be equal to:" + str(profit) + "yuan principal plus profit will be equal to:" + str(profit + money) + "yuan")
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