somescript.sql'
您可以在读取模式下打开当前文件。读取每一行并对其进行处理,例如,如果有一个列名,则先大写,然后将空格替换为 _ 这可以使用正则表达式来完成。稍后您可以删除旧文件并将临时文件重命名为旧文件名。
脚本.py:
import os, re
with open("somescript.sql") as i: # open sql file for reading
with open("temp", "w") as o: # tem file for writing
for l in i: # read line by line
c = re.match(r".*\[(?P<col_name>.*)\].*", l) # use re to find col_name
if c: # if column name found
c = c.group('col_name') # change col name
o.write(l.replace('['+c+']', '['+c.title().replace(' ', '_'))+']')
else: # ^^ col name titled and replace every space by _
o.write(l)
os.remove("somescript.sql") # delete old file
os.rename("temp", "somescript.sql") # rename file
我做了如下,我有两个文件:
answer$ ls
script.py somescript.sql
一些脚本文件是:
answer$ cat somescript.sql
Create Table Data(
[SOME ID] int,
[LAST NAME] varchar(30),
[FIRST NAME] varchar(30),
[TLA THING] smallint,
[TLA THING REMARK] varchar(255)
)
$ python script.py # run script
/answer$ cat somescript.sql
Create Table Data(
[Some_Id] int,
[Last_Name] varchar(30),
[First_Name] varchar(30),
[Tla_Thing] smallint,
[Tla_Thing_Remark] varchar(255)
)
解释:o.write(l.replace(c, c.title().replace(' ', '_')))
o.write(x)
x
在文件中写入一个字符串
l.replace(c, c.title().replace(' ', '_'))
用第二个参数替换c
列名的第一个参数c.title().replace(' ', '_')
,第二个参数的c
标题后跟空格替换为_
。