如何在python中从file.sql打印tablename和主键

我需要使用下面的程序打印tablename和主键。但它不起作用。你能帮我解决这个问题吗。 我使用了regex模式来查找数据库模式中的表名和主键数据

class ParseCreateFile:

    begin = re.compile(r"CREATE \s+ TABLE \s+'((?:[^']|'')*)'.+(PRIMARY \s+ KEY\s? \([^)]*\))", re.IGNORECASE | re.VERBOSE | re.DOTALL)

    def __init__(self,fileName):
        self.fileName = fileName
        self.readFromFile()

    def readFromFile(self):
        try:
            file = open(self.fileName,'r')
            fileData = file.read()
            file.close()
            self.parse(fileData)
        except IOError:
            print 'Unable to read file %s' % self.fileName

    def parse(self,rawData):
        self.list = []
        while rawData:
          mo = self.begin.search(rawData)
          tablename, fil = mo.groups()
          print tablename, fil
          if mo is None:
            break
          rawData = rawData[mo.end():]

    if __name__ == '__main__':
        print "only the main classes"
        file = ParseCreateFile('file2.sql')

file2.sql

---

我编辑了正则表达式，并使用了findall

class ParseCreateFile:

    begin = re.compile(r"CREATE TABLE[ ']*([^ ']+)[ ']*[(][^/;]+(PRIMARY KEY.*)[^/;]+;", re.IGNORECASE)

    def __init__(self,fileName):
        self.fileName = fileName
        self.readFromFile()

    def readFromFile(self):
        try:
            file = open(self.fileName,'r')
            fileData = file.read()
            file.close()
            self.parse(fileData)
        except IOError:
            print 'Unable to read file %s' % self.fileName

    def parse(self,rawData):
        self.list = []
        found = self.begin.findall(rawData)
        for i in found:
            print i[0], i[1]


if __name__ == '__main__':
    print "only the main classes"
    file = ParseCreateFile('file2.sql')

---

可能与简单字符串重复，一切正常。但是当我尝试使用上面的程序处理文件时，同样的方法不起作用，输出显示为“仅主类”。它不起作用。未显示所需的输出。已删除

re.VERBOSE | re.DOTALL

感谢您的回答，如果我有这样的表，请创建表“x”（“x”整数主键（dn））；创建表“y”（“X1”整数主键（dn1，dn2））；上面的逻辑不起作用。希望到目前为止，这对您拥有的一切都有效，您需要修复正则表达式<代码>重新编译（r“创建表[']*（[^']+）[']*[（[^/；]+（主键。*？\）[^/；]+”，re.IGNORECASE）

class ParseCreateFile:

    begin = re.compile(r"CREATE TABLE[ ']*([^ ']+)[ ']*[(][^/;]+(PRIMARY KEY.*)[^/;]+;", re.IGNORECASE)

    def __init__(self,fileName):
        self.fileName = fileName
        self.readFromFile()

    def readFromFile(self):
        try:
            file = open(self.fileName,'r')
            fileData = file.read()
            file.close()
            self.parse(fileData)
        except IOError:
            print 'Unable to read file %s' % self.fileName

    def parse(self,rawData):
        self.list = []
        found = self.begin.findall(rawData)
        for i in found:
            print i[0], i[1]


if __name__ == '__main__':
    print "only the main classes"
    file = ParseCreateFile('file2.sql')