Question

我正在使用python进行机械化。

<form action="/monthly-reports"  accept-charset="UTF-8" method="post" id="sblock">

此处的表单没有名称。如何使用id？

解析表单

Answer 1

我发现这是同一问题的解决方案。 br是机械化对象：

formcount=0
for frm in br.forms():  
  if str(frm.attrs["id"])=="sblock":
    break
  formcount=formcount+1
br.select_form(nr=formcount)

我确信上面的循环计数器方法可以更加pythonic，但是这应该选择具有属性id="sblock"的表单。

Answer 2

对python412524的例子进行了改进，文档说明这也是有效的，我觉得它更清洁一点：

for form in br.forms():
    if form.attrs['id'] == 'sblock':
        br.form = form
        break

Answer 3

对于任何未来的观众，这是使用predicate参数的另一个版本。请注意，如果您愿意，可以将其与lambda组成一行：

def is_sblock_form(form):
    return "id" in form.attrs and form.attrs['id'] == "sblock"

br.select_form(predicate=is_sblock_form)

来源：https://github.com/jjlee/mechanize/blob/master/mechanize/_mechanize.py#L462

Answer 4

尝试使用：br.select_form(nr=0)，其中nr是表单编号（您不需要名称或ID）。

Answer 5

尝试：

[f.id for f in br.forms()]

它应该从您的页面返回所有表单ID的列表

Answer 6

g_form_id = ""


def is_form_found(form1):
    return "id" in form1.attrs and form1.attrs['id'] == g_form_id


def select_form_with_id_using_br(br1, id1):
    global g_form_id
    g_form_id = id1
    try:
        br1.select_form(predicate=is_form_found)
    except mechanize.FormNotFoundError:
        print "form not found, id: " + g_form_id
        exit()


# ... goto the form page, using br = mechanize.Browser()

# now lets select a form with id "user-register-form", and print its contents
select_form_with_id_using_br(br, "user-register-form")
print br.form


# that's it, it works! upvote me if u like

Answer 7

您可以使用Browser类的函数select_form的谓词参数。像这样：

from mechanize import Browser, FormNotFoundError

try:
   br.select_form(predicate=lambda frm: 'id' in frm.attrs and frm.attrs['id'] == 'sblock')
except FormNotFoundError:
  print("ERROR: Form not Found")

使用id机械化选择表单

7 个答案: