TypeError: expecting string or bytes object

Question

我正在尝试将 CSV 数据插入 Oracle table。但是出现错误

TypeError: expecting string or bytes object

代码：

with open('file.csv', 'r') as srcfile:
reader = csv.reader(srcfile, dialect = 'fileProperties')
header = next(reader)
header = ", ".join(str(h) for h in header)
insert = 'insert into table (' + header + ') values ('
#print(insert) 

for row in reader:
    data = [insert + str(row).strip("[]") + ');']

cur.prepare(data)
cur.execute(data)

错误：

TypeError                                 Traceback (most recent call last)
<ipython-input-154-8814eee5c788> in <module>
  1 #cur.prepare(data)
----> 2 cur.execute(data)

TypeError: expecting string or bytes object

如何修复代码？

Answer 1

已解决问题。

第一个问题是，使用 executemany 时，list 不能作为参数传递，但是 list 在使用 execute

第二个问题，插入时需要绑定源数据。然而，而不是努力编码绑定变量，获取列名并传递绑定变量动态地，以便在文件中添加或删除的任何列都可以在没有修改代码

with open('G:\Project\ETL\data\CME.csv', 'r') as srcfile:
reader = csv.reader(srcfile, dialect = 'fileProperties')
header = next(reader)
columns = ", ".join(str(h) for h in header)
length = len(next(reader))
bind = []
data = []

for binds in range(1, length+1):
    bind.append(':' + str(binds))


insert = 'insert into ledger_source_python (' + columns + ') values (' + ", ".join(str(l) for l in bind) + ')' 

for row in reader:
    data.append(row)

cur.executemany(insert, data)
con.commit()

TypeError: expecting string or bytes object

TypeError: expecting string or bytes object

python

cx-oracle