send string to text window by window handle

from pywinauto  import application
import psutil
import re

def getPid(pName):
    process = psutil.process_iter()
    for pro in process :
        str_pro = str(pro)
        pat = re.compile(pName)
        if pat.search(str_pro):
            pid = str_pro.split('pid=')[1].split(',')[0]
            return pid

app = application.Application()

pid = getPid(app_name)
print pid, type(pid)

app.connect(process=int(pid))
# handle 是编辑框的ID
app.window_(title_re=chat_name).window(handle=1121066).TypeKeys('中文'.decode(
    'utf-8'))