python操作sqlite3数据库完全代码，pythonsqlite3,# Name: pySn
# Name: pySnipnix.py# Author: pantuts# Email: pantuts@gmail.com# Description: Saving your snippets to sqlite3 database.# Agreement: You can use, modify, or redistribute this tool under# the terms of GNU General Public License (GPLv3).# This tool is for educational purposes only. Any damage you make will not affect the author.# first run: python pySnipnix.py#!/usr/bin/pythonimport argparseimport sqlite3import reimport sys# important, create the filefileN = open('database.db', 'a+')def main(): # add all arguments needed # for argument that need FILE use [ type=argparse.FileType('r') ] parser = argparse.ArgumentParser(description=None, usage='python %(prog)s -h --help -f file -s search -a \'title\' \'code here\' -e id -d id -v --version') parser.add_argument('-f', metavar='filename', type=argparse.FileType('r'), dest='filename', help='File for database') parser.add_argument('-s', metavar='string', dest='search', help='Search for string in database') parser.add_argument('-a', metavar='string', dest='add', nargs=2, help='Add snippet. You should use \'\' for long string') parser.add_argument('-e', metavar='id', type=int, dest='edit', help='Edit snippet') parser.add_argument('-d', metavar='id', type=int, dest='delete', help='Delete from database') parser.add_argument('-S', dest='show', action='store_true', help='Show all records') parser.add_argument('-v', '--version', action='version', version='%(prog)s 1.0', help='Print version') # parse all arguments to 'args' args = parser.parse_args() # database connection conn = sqlite3.connect('database.db') cur = conn.cursor() def createTable(): cmd = 'CREATE TABLE IF NOT EXISTS snippets (id INTEGER PRIMARY KEY AUTOINCREMENT, title VARCHAR(50), code VARCHAR NOT NULL)' cur.execute(cmd) conn.commit() def insertSnippets(): # convert the string to lowercase and then execute lst = [args.add[0].lower() , args.add[1].lower()] cmd = 'INSERT INTO snippets VALUES (NULL, ?, ?)' cur.execute(cmd, lst) conn.commit() print('\nNew Snippet...') print('Snippet Title: \t%s' % args.add[0]) print('Code: \t\t%s' % args.add[1]) def editSnippets(): cur.execute('SELECT * FROM snippets where id=%s' % str(args.edit)) res = cur.fetchone() if res is None: print('No record to edit!') else: resl = [result for result in res] print('Current title >> ' + resl[1]) ed1 = input('Title (Leave black, same title): ') print('Current snippet >> ' + resl[2]) ed2 = input('Code: ') if ed1 is '': ed1 = resl[1] cur.executemany('UPDATE snippets SET title=\'%s\', code=\'%s\' WHERE id=?' % (ed1.lower(), ed2.lower()), str(resl[0])) conn.commit() print('Done!\n') def deleteSnippets(): print('\nDeleting record with ID %s ...' % str(args.delete)) # first find if record exists and return false if not found cur.execute('SELECT * FROM snippets where id=%s' % str(args.delete)) res = cur.fetchone() if res is None: print('No record to delete!') else: cmd = 'DELETE FROM snippets where id=%s' % str(args.delete) cur.execute(cmd) conn.commit() print('Deleted!\n') def showOrSearch(cmd): # creating conn.create_function explanation: 1st(string to be used inside SQL), 2nd(count of arguments), 3rd(the function created) def matchPattern(pattern, columnName): pat = re.compile(pattern) return pat.search(columnName) is not None conn.create_function('matchPattern', 2, matchPattern) if cmd == 2: cur.execute('SELECT * FROM snippets WHERE matchPattern(\'%s\', title)' % str(args.search.lower())) else: cmd = 1 cur.execute('SELECT * FROM snippets') res = cur.fetchall() # create empty dict, process filter keys and values s = {'id':{}, 'title':{}, 'code':{}} print('\nRecords result...') for result in res: s['id'] = result[0] s['title'] = result[1] s['code'] = result[2] print('[%s]\t[ %s ]---------->[ %s ]\n' % (s['id'], s['title'], s['code'])) # invoke creation of table createTable() if len(sys.argv) < 1: parser.print_help() # do filtering when -f 'filename' is correct if args.filename is not None: if args.show: if args.add or args.delete or args.search or args.edit: print('\nYou can\'t use other options with -S option') exit() else: args.add = None args.delete = None args.search = None args.edit = None showOrSearch(1) elif args.edit: if args.add or args.delete or args.search: print('\nYou can\'t use other options with -e option') exit() else: args.search = None args.add = None args.delete = None editSnippets() else: if args.add is None and args.delete is None and args.search is None: print('\n!!!!!You need to specify addional arguments to process the database!!!!!\n') parser.print_help() if args.search: args.edit = None showOrSearch(2) if args.add: args.edit = None args.search = None insertSnippets() if args.delete: args.search = None args.edit = None deleteSnippets() else: parser.print_help() # close our connection to the database conn.commit() conn.close() def by(): print('\n[Script by: pantuts]') print('[email: pantuts@gmail.com]')if __name__=="__main__": main() # close our file fileN.close()
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