Python AttributeError：“str”对象没有属性“DataFrame”
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Python AttributeError: 'str' object has no attribute 'DataFrame'
提问by Tyler Cowan
The following code snippet worked fine until I added a couple of lines of code that referenced date but does not append or change it above it. with the simple case of setting
以下代码片段运行良好，直到我添加了几行引用日期但未在其上方附加或更改它的代码。与设置的简单情况
date = ['1/1/2001','1/1/2001','1/1/2001','1/1/2001']
the code
编码
import pandas as pd
ProdDate = ['1/1/2001','1/1/2001','1/1/2001','1/1/2001']
df = pd.DataFrame(ProdDate, columns = ['Date'])
works fine. which is why this is confusing because now date is a list of 250000 values which has been working no problem until I added a few lines of code above and now this line returns
工作正常。这就是为什么这令人困惑，因为现在 date 是一个 250000 个值的列表，它一直工作没有问题，直到我在上面添加了几行代码，现在这一行返回
AttributeError: 'str' object has no attribute 'DataFrame'
which I cant seem to replicate in the simple case no matter what I do.
无论我做什么，我似乎都无法在简单的情况下复制。
EDIT
编辑
the few lines of code
几行代码
for i in range(0,len(UniqueAPI)):
for j in range(0,len(API)):
if UniqueAPI[i] == API[j]:
index = j
pd = PDays[j]
g = vG[j]
o = vO[j]
c = vC[j]
lhs, rhs = str(ProdDate[j]).rsplit("/", 1)
daycounter = 0
start = 365 - int(pd)
if clndr.isleap(int(rhs)):
calDays = LeapDaysInMonth
else:
calDays = DaysInMonth
break
for j in range(0,12):
daycounter = daycounter + DaysInMonth[j]
if daycounter - start >= 0:
m = j
break
for j in range(0,12):
if m == 0:
break
if j < m:
Liq[index+j] = 0
Gas[index+j] = 0
else:
if clndr.isleap(int(rhs)):
days = 366
Gas[index+j] = (g/days)*LeapDaysInMonth[j]
Liq[index+j] = (o/days)*LeapDaysInMonth[j] + (cndval/days)*LeapDaysInMonth[j]
else:
days = 365
Gas[index+j] = (g/days)*DaysInMonth[j]
Liq[index+j] = (o/days)*DaysInMonth[j] + (c/days)*DaysInMonth[j]
采纳答案by Karl Knechtel
The error means exactly what it says:
该错误的含义正是它所说的：
AttributeError: 'str' object has no attribute 'DataFrame'
^ ^ ^
the kind of error | |
the thing you tried to use what was missing from it
The line it's complaining about:
它抱怨的那一行：
df = pd.DataFrame(date, columns = ['Date'])
^ ^
| the attribute the error said was missing
the thing the error said was a string
has been working no problem until I added a few lines of code above
一直工作没问题，直到我在上面添加了几行代码
Evidently, somewhere in the "few lines of code above", you caused pdto be a string. And sure enough, when we look at those few lines of code, we find:
显然，在“上面几行代码”中的某个地方，您导致pd了一个字符串。果然，当我们查看这几行代码时，我们发现：
pd = PDays[j]
^ ^
| the string that you're making it into
the thing that you're making a string
回答by xio
You are reassign pd
你被重新分配 pd
import pandas as pd
to
到
pd = PDays[j]
