如何在查询的__init__方法中访问django表单值

from django import forms

class MyForm(forms.Form):
    field1 = forms.CharField(label='Field 1')
    field2 = forms.CharField(label='Field 2')

def my_view(request):
    if request.method == 'POST':
        form = MyForm(request.POST)
        if form.is_valid():
            # 表单验证通过，可以在这里访问表单值
            field1_value = form.cleaned_data['field1']
            field2_value = form.cleaned_data['field2']
            # 其他操作...
    else:
        form = MyForm()

    return render(request, 'my_template.html', {'form': form})