python中的文件访问
每当我为我的程序加载文本文件时，它都会在文本文件中显示信息，但当我输入花名册功能时，它不会显示文本文件，并显示可修改的文本文件。这与我最初创建文本文件的方式有关，还是我为python中的文件访问,python,Python,每当我为我的程序加载文本文件时，它都会在文本文件中显示信息，但当我输入花名册功能时，它不会显示文本文件，并显示可修改的文本文件。这与我最初创建文本文件的方式有关，还是我为loadData编写的代码写得不正确？我想我可能会对只是设置一个函数来读回文件而不是实际打开文本文件来修改文件之间的区别感到困惑 dict_member = {} players = dict_member class Players: def __init__(self, name, number, jersey):
loadDatadict_member = {}
players = dict_member
class Players:
def __init__(self, name, number, jersey):
self.name = name
self.number = number
self.jersey = jersey
def display(self):
print('Printing current members\n')
for number, player in dict_member.items():
print(player.name + ', ' + player.number + ', ' + player.jersey)
def add(self):
nam = input("Enter Player Name\n ")
numb = input("Enter Player Number\n ")
jers = input("Enter Jersey Number\n ")
dict_member[nam] = Players(nam, numb, jers)
def remove(self, name):
if name in dict_member:
del dict_member[name]
def edit(self, name):
if name in dict_member:
nam = input("Enter Different Name\n")
num = input("Enter New Number\n ")
jers = input("Enter New Jersey Number\n ")
del dict_member[name]
dict_member[name] = Players(nam, num, jers)
else:
print("No such player exists")
def saveData(self):
roster = input("Filename to save: ")
print("Saving data...")
with open(roster, "r+") as rstr:
for number, player in dict_member.items():
rstr.write(player.name + ', ' + player.number + ', ' + player.jersey)
print("Data saved.")
rstr.close()
def loadData(self):
dict_member = {}
roster = input("Filename to load: ")
file = open(roster, "r")
while True:
inLine = file.readline()
if not inLine:
'break'
inLine = inLine[:-1]
name, number, jersey = inLine.split(",")
dict_member[name] = (name, number, jersey)
print("Data Loaded Successfully.")
file.close()
return dict_member
def display_menu():
print("")
print("1. Roster ")
print("2. Add")
print("3. Remove ")
print("4. Edit ")
print("5. Save")
print("6. Load")
print("9. Exit ")
print("")
return int(input("Selection> "))
print("Welcome to the Team Manager")
player_instance = Players(None, None, None)
menu_item = display_menu()
while menu_item != 9:
if menu_item == 1:
player_instance.display()
elif menu_item == 2:
player_instance.add()
elif menu_item == 3:
m = input("Enter Player to Remove\n")
player_instance.remove(m)
elif menu_item == 4:
m = input("Enter Player to Edit\n")
player_instance.edit(m)
elif menu_item == 5:
player_instance.saveData()
elif menu_item == 6:
player_instance.loadData()
menu_item = display_menu()
print("Exiting Program...")
在显示花名册之前，您没有将数据加载到dict_member 当您在loadData函数中加载数据时，您将重新定义dict_成员 因此，它将“阴影”外部
dict_成员displaydict_成员def loadData(self):
# **remove this line --->** dict_member = {}
roster = input("Filename to load: ")
file = open(roster, "r")
while True:
inLine = file.readline()
if not inLine:
break
inLine = inLine[:-1]
name, number, jersey = inLine.split(",")
dict_member[name] = (name, number, jersey)
print("Data Loaded Successfully.")
file.close()
return dict_member
def loadData(self):
file = open(input("Filename to load: "), "r")
text = file.read()
file.close()
for line in text:
name, number, jersey = (line.rstrip()).split(',')
dict_member[name] = (name, number, jersey)
print("Data Loaded Successfully.")
return dict_member
def saveData(self, dict_member):
file = open(input("Filename to save: "), "a")
for number, player in dict_member.items():
rstr.write(player.name + ', ' + player.number + ', ' + player.jersey)
print("Data saved.")
file.close()
我认为错误在于您使用了字符串形式的
“break”break回溯（最近一次调用最后一次）：文件“C:/Users/Family/PycharmProjects/Week5/Team Management 2.py”，第77行，在player_instance.loadData（）文件“C:/Users/Family/PycharmProjects/Week5/Team Management 2.py”，第44行，在loadData name，number，jersey=（line.rstrip（））中。拆分（，）ValueError:没有足够的值来解包（预期为3，得到1），，ValueError:I/O操作关闭的文件。file=open（花名册，“r”）怎么可能loadData