在将sqlite3数据库读入pandas DataFrame时如何修复SyntaxError

Question

I'am trying to read sqlite3 database using pandas. Unfortunately in my code is SyntaxError but i can't find it.

The code is the same as in many tutorials so i don't know where is the problem

import pandas as pd
import sqlite3

con = sqlite3.connect("activity_log.db")
query = "SELECT * from log"
df = pd.read_sql_query(query, con)

print(df)

con.close()

result:

" Traceback (most recent call last):
  File "C:/Users/g50-45/Desktop/ML/1z10_webapp/data_analyser.py", line 7, in <module>
    df = pd.read_sql_query(query, con)

  File "C:\Users\g50-45\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pandas\io\sql.py", line 325, in read_sql_query
    pandas_sql = pandasSQL_builder(con)

  File "C:\Users\g50-45\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pandas\io\sql.py", line 575, in pandasSQL_builder
    if _is_sqlalchemy_connectable(con):

  File "C:\Users\g50-45\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pandas\io\sql.py", line 44, in _is_sqlalchemy_connectable
    import sqlalchemy

  File "C:\Users\g50-45\AppData\Local\Programs\Python\Python37-32\lib\site-packages\sqlalchemy\__init__.py", line 12, in <module>
    from sqlalchemy.sql import (

  File "C:\Users\g50-45\AppData\Local\Programs\Python\Python37-32\lib\site-packages\sqlalchemy\sql\__init__.py", line 7, in <module>
    from sqlalchemy.sql.expression import (

  File "C:\Users\g50-45\AppData\Local\Programs\Python\Python37-32\lib\site-packages\sqlalchemy\sql\expression.py", line 2452

    ^
SyntaxError: invalid syntax "

Answer 1

The sqlalchemy package looks like 6 years old ( sqlalchemy\\sql\\expression.py.py", line 2452 ), before an important refactoring.

You should remove this package and reinstall it with a newer version or try an update with:

pip install SQLAlchemy --upgrade