【scrapy】FormRequest <TypeError: to_bytes must receive a unicode, str or bytes object, got int>

原因：formData里面有的参数是数字，转成字符串就行

for i in range(5):
num = i+1
data = {
    'ajax' : 'ajax',
    'searchKey':'searchKey',
    'projectStatus':'projectStatus',
    'projectModel':'-1',
    'financingModel':'0',
    'pageNo':str(num),
    'pageCount':'12'
}