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[英]Read in tuple of lists from text file as tuple, not string - Python
[英]Python: Cannot print tuple of 5 lists to file
我试图在Python中将一个包含5个列表的元组打印到一个文件中,但是,我得到了错误:
TypeError: Can't convert 'tuple' object to str implicitly
以下是我的代码:
def listjoin():
illegallist = zip(carreglist, illegalspeed, illegaltime, illegalname, illegaladdress)
for item in illegallist:
illegaldatafile.write("Registration: "+item)
illegaldatafile.write("\n")
illegaldatafile.write("Speed "+item)
illegaldatafile.write("\n")
illegaldatafile.write("Time: "+item)
illegaldatafile.write("\n")
illegaldatafile.write("Name: "+item)
illegaldatafile.write("\n")
illegaldatafile.write("Address: "+item)
illegaldatafile.write("\n")
illegaldatafile.write("\n")
illegaldatafile.close()
我想要得到这样的东西:
Registration: BH34JKX
Speed: 80
Time: 6:45:21
Name: John Adams
Address: SW34 7MN
Registration: DX34JKS
等。(意外发布太早)
我在代码中先前打印了一个列表到文件,并且不需要将其转换为字符串。 我不能这样做:
illegallist = zip(str(carreglist, illegalspeed, illegaltime, illegalname, illegaladdress))
因为str()只需要3个参数。 我试过把它放在这里:
illegallist = str(zip(carreglist, illegalspeed, illegaltime, illegalname, illegaladdress))
但后来它只是说我的文件已关闭。
您将相同的元组item
反复追加到字符串中。 你必须从这个元组中获取单个元素。 这是我的(更紧凑)提案:
colnames = ['Registration', 'Speed', 'Time', 'Name', 'Address']
for tup in zip(carreglist, illegalspeed, illegaltime, illegalname, illegaladdress):
for colname, value in zip(colnames, tup):
illegaldatafile.write('{}: {}\n'.format(colname, value))
illegaldatafile.write('\n')
与其说每次循环迭代的项目简单的item
,你应该解开它让您可以更轻松地引用每个对象。 字符串格式化也很有用:
def listjoin():
illegallist = zip(carreglist, illegalspeed, illegaltime, illegalname, illegaladdress)
for reg,speed,timing,name,address in illegallist:
illegaldatafile.write("Registration: {}\n".format(reg))
illegaldatafile.write("Speed: {}\n".format(speed))
illegaldatafile.write("Time: {}\n".format(timing))
illegaldatafile.write("Name: {}\n".format(name))
illegaldatafile.write("Address: {}\n\n".format(address))
illegaldatafile.close()
您可以将print
语句与file
参数一起使用,如果只有5个元组,则可以使用%
:
def listjoin():
illegallist = zip(carreglist, illegalspeed, illegaltime, illegalname, illegaladdress)
for item in illegallist:
print("Registration: %s" % item[0], file=illegaldatafile)
print("Speed: %s" % item[1], file=illegaldatafile)
print("Time: %s" % item[2], file=illegaldatafile)
print("Name: %s" % item[3], file=illegaldatafile)
print("Address: %s" % item[4], file=illegaldatafile)
print(file=illegaldatafile)
illegaldatafile.close()
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