如何在Python腳本中的MySQL查詢中使用可變路徑

Question

我無法在python腳本中獲取MySQL查詢中的變量路徑。路徑變量或者用雙反斜線解決，或者根本不解決。

這工作：

cursor.execute ("""load data local infile 'M:/Users/Jonathan/Dropbox/BCHS_3015/Spatial Data/Cartographic Data/USA/acs_data/Sequence_Number_and_Table_Number_Lookup.csv' 
       into table Sequence_Table_Lookup 
       fields terminated by ','enclosed by '"' 
       lines terminated by '\r\n' 
       ignore 1 lines 
       (File_ID,Table_ID,Sequence_Number,Line_Number, Subject_Area)"""); 

這下返回錯誤：

_mysql_exceptions.InternalError: (22, "File 'M:UsersJonathanDropbox\x08chs_3015spatial datacartographic datausaacs_dataSequence_Number_and_Table_Number_Lookup.txt' not found (Errcode: 22)") 

cursor.execute ("""load data local infile '%s' 
       into table Sequence_Table_Lookup 
       fields terminated by ','enclosed by '"' 
       lines terminated by '\r\n' 
       ignore 1 lines 
       (File_ID,Table_ID,Sequence_Number,Line_Number, Subject_Area)""" % filepath); 

刪除％左右產量的影響單引號

_mysql_exceptions.ProgrammingError: (1064, "You have an error in your SQL syntax; 
check the manual that corresponds to your MySQL server version for the right 
syntax to use near 'M:\\Users\\Jonathan\\Dropbox\\bchs_3015\\spatial data\\cartographic data\\usa\\acs_data\\' at line 1") 

我希望瞭解如何幫忙將可變路徑插入到MySQL查詢中。

我在一臺Windows機器上在Eclipse中使用PyDev。 Python 2.7和MySQLdb連接器。

的相關代碼的完整塊

conn = MySQLdb.connect (host = "localhost", 
          user = "user", 
          passwd = "pwd", 
          db = "gis_census_acs") 
#finds census directory 
dropbox = navigation.get_dropbox_home() 
acs_data = os.path.join(dropbox,'bchs_3015','spatial data','cartographic data','usa','acs_data'); 

for filepath in navigation.get_filepaths(acs_data): 
     filename = os.path.split(filepath)[1] 
     if filename == 'Sequence_Number_and_Table_Number_Lookup.txt': 
      print filepath; 
      tablename = filename.split('.')[0].replace(' ','_')[0:64] 
      cursor = conn.cursor() 
      cursor.execute ('create table if not exists ' + tablename + """(
        File_ID varchar(255), 
        Table_ID varchar(255), 
        Sequence_Number varchar(255), 
        Line_Number varchar(255), 
        Start_Position varchar(255), 
        Total_cells_in_Table varchar(255), 
        Total_Cells_in_Sequence varchar(255), 
        Table_title text, 
        Subject_Area text 
        )"""); 
      cursor.execute ("""load data local infile '%s' 
        into table Sequence_Table_Lookup 
        fields terminated by ','enclosed by '"' 
        lines terminated by '\r\n' 
        ignore 1 lines 
        (File_ID,Table_ID,Sequence_Number,Line_Number, Start_Position, 
        Total_cells_in_Table, Total_Cells_in_Sequence, Table_title, Subject_Area)""" % filepath); 
      print "Number of rows inserted: %d" % cursor.rowcount 
      cursor.close() 
     else: 
      print "not the file" 
conn.close() 

Answer 1

該文件存在：

M:/Users/Jonathan/Dropbox/BCHS_3015/Spatial Data/Cartographic Data/USA/acs_data/Sequence_Number_and_Table_Number_Lookup.csv 

如你期望的那樣，這個奇怪的一個犯規：

M:UsersJonathanDropbox\x08chs_3015spatial datacartographic datausaacs_dataSequence_Number_and_Table_Number_Lookup.txt 

好像有什麼毛病你的文件路徑。嘗試檢查出來。