[英]Pandas from csv to sql in Django: OperationalError, table x has no column named y
[英]pandas.read_csv : OperationalError: table has no column named 1
我正在尝试使用以下命令将csv上传到Windows上的sqllite表:
sqllite表和csv具有相同的字段名称,并以:
CREATE TABLE test2 (
id INTEGER NOT NULL,
"case" TEXT,
......
PRIMARY KEY (id),
UNIQUE ("case")
)
我有以下课程:
class Sqllite_utilities(object):
def __init__(self, db_path, table_name):
self.db_path = db_path
self.table_name = table_name
def upload_csv_to_table(self, path_to_csvfile):
conn = sqlite3.connect(self.db_path)
df = pandas.read_csv(path_to_csvfile)
df.to_sql(self.table_name, conn, if_exists='append', index_label='id')
在命令行中:
s = Sqllite_utilities(settings.SETTINGS_PATH+"\\data.db",'test2')
In[3]: s.upload_csv_to_table('C:\Users\ne\Desktop\jtest.csv')
C:\lib\site-packages\pandas\core\generic.py:1201: UserWarning: The spaces in these column names will not be changed. In pandas versions < 0.14, spaces were converted to underscores.
chunksize=chunksize, dtype=dtype)
Traceback (most recent call last):
File "C:\lib\site-packages\IPython\core\interactiveshell.py", line 2885, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File "<ipython-input-3-b530f5199977>", line 1, in <module>
s.upload_csv_to_table('C:\Users\dnir\Desktop\jtest.csv')
File "F:\ENVS\r2\j1\utilities.py", line 41, in upload_csv_to_table
df.to_sql(self.table_name, conn, if_exists='append', index_label='id')
File "C:\lib\site-packages\pandas\core\generic.py", line 1201, in to_sql
chunksize=chunksize, dtype=dtype)
File "C:\lib\site-packages\pandas\io\sql.py", line 470, in to_sql
chunksize=chunksize, dtype=dtype)
File "C:\lib\site-packages\pandas\io\sql.py", line 1503, in to_sql
table.insert(chunksize)
File "C:\lib\site-packages\pandas\io\sql.py", line 664, in insert
self._execute_insert(conn, keys, chunk_iter)
File "C:\lib\site-packages\pandas\io\sql.py", line 1291, in _execute_insert
conn.executemany(self.insert_statement(), data_list)
OperationalError: table test2 has no column named 1
我究竟做错了什么?
编辑:我想你明白了,我遇到了一个新的错误,我将分别进行研究:
df.to_sql(self.table_name, conn, if_exists='append', index_label='id')
File "C:\lib\site-packages\pandas\core\generic.py", line 1201, in to_sql
chunksize=chunksize, dtype=dtype)
File "C:\lib\site-packages\pandas\io\sql.py", line 470, in to_sql
chunksize=chunksize, dtype=dtype)
File "C:\lib\site-packages\pandas\io\sql.py", line 1503, in to_sql
table.insert(chunksize)
File "C:\lib\site-packages\pandas\io\sql.py", line 642, in insert
keys, data_list = self.insert_data()
File "C:\lib\site-packages\pandas\io\sql.py", line 609, in insert_data
"duplicate name in index/columns: {0}".format(err))
ValueError: duplicate name in index/columns: cannot insert id, already exists
问题出在索引列,Pandas将数据框的索引作为列“索引”。 如果您不想在没有记录的情况下插入记录,请尝试此操作。
df.to_sql(...,index = False)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.