Question

我有以下代码的变体，我已经多次重写并得到相同的错误。 OperationalError: near ".": syntax error我用Google搜索并删除了一个主键并检查所有字段名称是否以小写字母开头并且没有空格。我是SQLite的初学者，所以非常感谢任何帮助。

ETF = {'': '1', '#_of_holdings': '31', '%_in_top_10': '46.32%', '1_week': '-2.14%', '1_year': '3.86%', '200-day': '10.53%', '3_year': '39.32%', '4_week': '-6.65%', '5_year': 'n/a', 'annual_dividend_rate': '$0.18', 'annual_dividend_yield_%': '0.49%', 'assets': '13770', 'avg._vol': '4233', 'beta': '0.99', 'commission_free': 'Not Available', 'concentration': 'C', 'dividend': '$0.02', 'dividend_date': '2014-09-24', 'er': '1.25%', 'etfdb_category': 'Global Equities', 'expenses': 'C', 'inception': '2010-07-20', 'inverse': 'No',
 'leveraged': 'No', 'liquidity': 'C', 'lower_bollinger': '$36.16', 'lt_cap_gains': '15%', 'name': 'WCM/BNY Mellon Focused Growth ADR ETF', 'overall': 'C', 'p/e_ratio': '23.58', 'performance': 'A-', 'price': '36.10', 'resistance_1': '$36.10', 'rsi': '33', 'scoredividend': 'C', 'st_cap_gains': '35%', 'support_1': '$36.10', 'symbol': 'AADR', 'tax_form': '1099', 'upper_bollinger': '$38.80', 'value': '152.8113', 'volatility': 'C',
 'ytd': '-3.23%'}

import sqlite3
conn = sqlite3.connect('sample.sqlite')
cursor = conn.cursor()

cursor.execute('''CREATE TABLE static_data (p4w real, tax_form text, resistance_1 real, dividend_date date, \
                  expenses_rating text, avg_vol real, p5y real, scoredividend text, concentration text, expense_ratio real, \
                  inverse text, upper_bollinger real, p_e_ratio real, leveraged text, performance_rating text, pytd real, \
                  volatility text, price real, rsi real, lt_cap_gains real, holdings real, symbol real, overall_rating text,\
                   p1y real, beta real, p3y real, dividend_yield real, value real, inception date, dividend real, in_top_10 real,\
                    assets real, name text, st_cap_gains real, etfdb_category real, annual_dividend_rate real, support_1 real, \
                    lower_bollinger real, DMA200 real, liquidity text, p1w real, commission_free text)''')
conn.commit()

fieldnames = ['p4w','tax_form','resistance_1','dividend_date','expenses_rating','avg_vol',
              'p5y','scoredividend','concentration','expense_ratio','inverse','upper_bollinger',
              'p_e_ratio','leveraged','performance_rating','pytd','volatility','price','rsi',
              'lt_cap_gains','holdings','symbol','overall_rating','p1y','beta','p3y','dividend_yield',
              'value','inception','dividend','in_top_10','assets','name','st_cap_gains','etfdb_category',
                  'annual_dividend_rate','support_1','lower_bollinger','DMA200','liquidity','p1w',
                  'commission_free']

dictnames = ['4_week','tax_form','resistance_1','dividend_date','expenses','avg._vol',
             '5_year','scoredividend','concentration','er','inverse','upper_bollinger','p/e_ratio',
             'leveraged','performance','ytd','volatility','price','rsi','lt_cap_gains','#_of_holdings',
             'symbol','overall','1_year','beta','3_year','annual_dividend_yield_%','value','inception',
             'dividend','%_in_top_10','assets','name','st_cap_gains','etfdb_category',
             'annual_dividend_rate','support_1','lower_bollinger','200-day','liquidity','1_week',
             'commission_free']
fieldmap = zip(fieldnames,dictnames)

SQL_STRING = '''INSERT INTO static_data (%(colnames)s) values (%(dictfields)s);'''
colnames = ','.join(fieldnames)
dictnames = [":"+i for i in dictnames]
dictfields = ','.join(dictnames)
SQL_STRING_ETF = SQL_STRING % dict(colnames=colnames,dictfields=dictfields)
cursor.execute(SQL_STRING_ETF, ETF)

完全追溯在

之下

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/IPython/core/interactiveshell.py", line 2820, in run_code
    exec code_obj in self.user_global_ns, self.user_ns
  File "<ipython-input-41-64b4fceab545>", line 36, in <module>
    cursor.execute(SQL_STRING_ETF, ETF)
OperationalError: near ".": syntax error

SQL_STRING_ETF评估为

'INSERT INTO static_data (p4w,tax_form,resistance_1,dividend_date,expenses_rating,avg_vol,p5y,scoredividend,concentration,expense_ratio,inverse,upper_bollinger,p_e_ratio,leveraged,performance_rating,pytd,volatility,price,rsi,lt_cap_gains,holdings,symbol,overall_rating,p1y,beta,p3y,dividend_yield,value,inception,dividend,in_top_10,assets,name,st_cap_gains,etfdb_category,annual_dividend_rate,support_1,lower_bollinger,DMA200,liquidity,p1w,commission_free) values (:4_week,:tax_form,:resistance_1,:dividend_date,:expenses,:avg._vol,:5_year,:scoredividend,:concentration,:er,:inverse,:upper_bollinger,:p/e_ratio,:leveraged,:performance,:ytd,:volatility,:price,:rsi,:lt_cap_gains,:#_of_holdings,:symbol,:overall,:1_year,:beta,:3_year,:annual_dividend_yield_%,:value,:inception,:dividend,:%_in_top_10,:assets,:name,:st_cap_gains,:etfdb_category,:annual_dividend_rate,:support_1,:lower_bollinger,:200-day,:liquidity,:1_week,:commission_free);'

Answer 1

有一些无效的参数名称：

INSERT INTO static_data(...)
values (...,:avg._vol,:5_year,...,:p/e_ratio,...,:#_of_holdings,...,:1_year,...,
        :3_year,:annual_dividend_yield_%,...,:%_in_top_10,...,:200-day,...,
        :1_week,:commission_free);

参数名称必须是有效的SQL标识符，即不能以数字开头，并且不能包含任何期望_的特殊字符。

您已经拥有表字段名称的有效名称;只需使用它们而不是dictnames（并在ETF词典中）。

Python SQlite3语法错误 - 无法弄清楚什么是错误的

1 个答案: