所以我幾乎把這段代碼寫對了，因為它只是關于字典的。我遇到的唯一問題是錯誤是一元 + 的錯誤操作數類型：'str'。這是我的代碼：express_file = {'TPLEX':'Pangasinan', 'SLEX':'Subic', 'Cavitex':'Bacoor,Cavite','MCX':'Muntinlupa','Star Tollway':'Laguna'}for x,y in express_file.items(): print(x,'runs through',+y+ '.')print('The following Expressway are included in this data set:')for x in express_file.keys(): print(x)print('\nThe following Provinces are included in this data set:')for x in express_file.values(): print(x)追溯---------------------------------------------------------------------------TypeError Traceback (most recent call last)<ipython-input-5-782fcd7b686e> in <module> 1 express_file = {'TPLEX':'Pangasinan', 'SLEX':'Subic', 'Cavitex':'Bacoor,Cavite','MCX':'Muntinlupa','Star Tollway':'Laguna'} 2 for x,y in express_file.items():----> 3 print(x,'runs through',+y+ '.') 4 print('The following Expressway are included in this data set:') 5 for x in express_file.keys():TypeError: bad operand type for unary +: 'str'
2 回答
慕仙森
TA貢獻1827條經驗 獲得超8個贊
用 f-string 打印
f-Strings：一種在 Python 中格式化字符串的新改進方法
PEP 498 - 文字字符串插值
# replace print(x,'runs through',+y+ '.')
# with
print(f'{x} runs through {y}.'
# or with
print(x,'runs through ' +y+ '.')? # note the added space after through and the removal of the ,
更新腳本
express_file = {'TPLEX':'Pangasinan', 'SLEX':'Subic', 'Cavitex':'Bacoor,Cavite','MCX':'Muntinlupa','Star Tollway':'Laguna'}
for x,y in express_file.items():
? ? print(f'{x} runs through {y}.')
print('The following Expressway are included in this data set:')
for x in express_file.keys():
? ? print(x)
print('\nThe following Provinces are included in this data set:')
for x in express_file.values():
? ? print(x)
[out]:
TPLEX runs through Pangasinan.
SLEX runs through Subic.
Cavitex runs through Bacoor,Cavite.
MCX runs through Muntinlupa.
Star Tollway runs through Laguna.
The following Expressway are included in this data set:
TPLEX
SLEX
Cavitex
MCX
Star Tollway
The following Provinces are included in this data set:
Pangasinan
Subic
Bacoor,Cavite
Muntinlupa
Laguna
智慧大石
TA貢獻1946條經驗 獲得超3個贊
express_file = {'TPLEX':'Pangasinan', 'SLEX':'Subic', 'Cavitex':'Bacoor,Cavite','MCX':'Muntinlupa','Star Tollway':'Laguna'}
for x,y in express_file.items():
print(x,'runs through'+y+ '.')
print('The following Expressway are included in this data set:')
for x in express_file.keys():
print(x)
print('\nThe following Provinces are included in this data set:')
for x in express_file.values():
print(x)
您應該刪除 +y+ 旁邊的逗號。
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