嵌套列表生成csv,读取csv,嵌套列表float转换为int

嵌套列表生成csv,读取csv,嵌套列表float转换为int

列表生成csv文件

a=[[1,2,3],[4,5,6],[7,8,9]]
path=r'C:\Users\Administrator\Desktop\testimage\20200922_1X.csv'
test=pd.DataFrame(a)
test.to_csv(path, encoding='gbk')

从csv中读取文件

data=pd.read_csv(path,index_col=0) #将csv文件读入并转化为dataframe形式
b = data.values
c = b.tolist()

pandas.read_csv()读取csv文件不读第一列

data=pd.read_csv(path,index_col=0)

加上index_col=0即可

嵌套列表float转换为int

```
testx = [[int(a) for a in b] for b in self.testy]
```

常见错误

• shape mismatch: indexing arrays could not be broadcast together with shapes
  一般都是两个list或者numpy的size不匹配
• cannot convert