Python: PDF：如何使用单选按钮从表单中读取
Python: PDF: How to read from a form with radio buttons
我按照 Creating Interactive PDF Forms in ReportLab with Python
中的示例创建了一个带有一些单选按钮的表单
这是代码示例，尤其是。对于收音机：
simple_radios.py
from reportlab.pdfgen import canvas
from reportlab.pdfbase import pdfform
from reportlab.lib.colors import magenta, pink, blue, green
def create_simple_radios():
c = canvas.Canvas('simple_radios.pdf')
c.setFont("Courier", 20)
c.drawCentredString(300, 700, 'Radio demo')
c.setFont("Courier", 14)
form = c.acroForm
c.drawString(10, 650, 'Dog:')
form.radio(name='radio1', tooltip='Field radio1',
value='value1', selected=False,
x=110, y=645, buttonStyle='check',
borderStyle='solid', shape='square',
borderColor=magenta, fillColor=pink,
textColor=blue, forceBorder=True)
form.radio(name='radio1', tooltip='Field radio1',
value='value2', selected=True,
x=110, y=645, buttonStyle='check',
borderStyle='solid', shape='square',
borderColor=magenta, fillColor=pink,
textColor=blue, forceBorder=True)
c.drawString(10, 600, 'Cat:')
form.radio(name='radio2', tooltip='Field radio2',
value='value1', selected=True,
x=110, y=595, buttonStyle='cross',
borderStyle='solid', shape='circle',
borderColor=green, fillColor=blue,
borderWidth=2,
textColor=pink, forceBorder=True)
form.radio(name='radio2', tooltip='Field radio2',
value='value2', selected=False,
x=110, y=595, buttonStyle='cross',
borderStyle='solid', shape='circle',
borderColor=green, fillColor=blue,
borderWidth=2,
textColor=pink, forceBorder=True)
c.drawString(10, 550, 'Pony:')
form.radio(name='radio3', tooltip='Field radio3',
value='value1', selected=False,
x=110, y=545, buttonStyle='star',
borderStyle='bevelled', shape='square',
borderColor=blue, fillColor=green,
borderWidth=2,
textColor=magenta, forceBorder=False)
form.radio(name='radio3', tooltip='Field radio3',
value='value2', selected=True,
x=110, y=545, buttonStyle='star',
borderStyle='bevelled', shape='circle',
borderColor=blue, fillColor=green,
borderWidth=2,
textColor=magenta, forceBorder=True)
c.save()
if __name__ == '__main__':
create_simple_radios()
我的 problem/question 代码是：
1.) 收音机始终处于 "pushed" 状态。我怎样才能取消他们？
2.) 可以分组，以便根据一个组只按下一 (1) 个单选按钮
3.) 我以后如何以编程方式读取按钮的状态，例如通过 PyPDF2?
版本：
Python: 3.7.3
报告实验室：3.5.19
枕头：6.0.0
PyPDF2：1.26.0
OS:
Windows10 v1809
1.) The radios are always in a "pushed" state. How can I unpush them?
按钮被按下如果 form.radio(... selected=True)
2.) Can the be grouped, so that only ONE (1) radio button is pushed according to a group?
name属性与组名相关。
所以form.radio(... name="group1")是一组form.radio(... name="group2")是第二组。 每组只能select一个收音机。
所以对于前两个问题，我创建了一个包含两个不同组的简单示例。
第一组 group 包含 Fruits 第二组包含 Cars:
from reportlab.pdfgen import canvas
from reportlab.pdfbase import pdfform
from reportlab.lib.colors import magenta, pink, blue, green, orange, yellow
def create_radios():
c = canvas.Canvas('radios.pdf')
c.setFont("Courier", 20)
c.drawCentredString(300, 800, 'Radio demo')
form = c.acroForm
#GROUP ONE, name='group1'
c.setFont("Courier", 16)
c.drawString(10, 680, 'Fruits:')
c.setFont("Courier", 12)
c.drawString(10, 650, 'Apple:')
form.radio(name='group1', tooltip='Apple',
value='apple', selected=False,
x=110, y=650, buttonStyle='check',
borderStyle='solid', shape='square',
borderColor=blue, fillColor=magenta,
textColor=blue, forceBorder=True)
c.drawString(10, 600, 'Banana:')
form.radio(name='group1', tooltip='Banana',
value='banana', selected=False,
x=110, y=600, buttonStyle='check',
borderStyle='solid', shape='square',
borderColor=blue, fillColor=yellow,
textColor=blue, forceBorder=True)
c.drawString(10, 550, 'Orange:')
form.radio(name='group1', tooltip='Orange',
value='orange', selected=False,
x=110, y=550, buttonStyle='check',
borderStyle='solid', shape='square',
borderColor=blue, fillColor=orange,
textColor=blue, forceBorder=True)
#GROUP TWO, name='group2'
c.setFont("Courier", 16)
c.drawString(210, 680, 'Cars:')
c.setFont("Courier", 12)
c.drawString(210, 650, 'Tesla:')
form.radio(name='group2', tooltip='Apple',
value='tesla', selected=False,
x=310, y=650, buttonStyle='circle',
borderStyle='solid', shape='circle',
borderColor=blue, fillColor=magenta,
textColor=blue, forceBorder=False)
c.drawString(210, 600, 'Mercedes-Benz:')
form.radio(name='group2', tooltip='Banana',
value='mercedes', selected=False,
x=310, y=600, buttonStyle='circle',
borderStyle='solid', shape='circle',
borderColor=blue, fillColor=magenta,
textColor=blue, forceBorder=False)
c.drawString(210, 550, 'Toyota:')
form.radio(name='group2', tooltip='Orange',
value='toyota', selected=False,
x=310, y=550, buttonStyle='circle',
borderStyle='solid', shape='circle',
borderColor=blue, fillColor=magenta,
textColor=blue, forceBorder=False)
c.save()
if __name__ == '__main__':
create_radios()
3.) How could I read the state of the buttons later on programmatically e.g. via PyPDF2?
我找到了一种更简单的方法，然后使用 PyPDF2 返回的字段数据...
使用pdfminer就可以很好的解决问题。
创建 radios.pdf 后，我使用 Adobe 更改了值并将其保存为新文件 radios_checked.pdf 您也可以更改每个组的一个 selected 属性。
import sys
from pdfminer.pdfparser import PDFParser
from pdfminer.pdfdocument import PDFDocument
from pdfminer.pdftypes import resolve1
filename = "radios_checked.pdf"
with open(filename, 'rb') as pdf_file:
parser = PDFParser(pdf_file)
doc = PDFDocument(parser)
fields = resolve1(doc.catalog['AcroForm'])['Fields']
for i in fields:
field = resolve1(i)
name = str(field.get('T'), 'utf-8')
value = field.get('V') #will return PSLiteral :/
# transform PSLiteral to string
if value != None:
value = str(value)
if value[0] == r"/":
value = value[2:-1]
value = str(value)
print("Group Name: {0}, checked value: {1} ".format(name , value))
这将过滤所有组对象并打印出 selected 组名称和 selected 值。
提示：
在文本编辑器中打开一个 pdf 并检查一般结构。
我按照 Creating Interactive PDF Forms in ReportLab with Python
中的示例创建了一个带有一些单选按钮的表单这是代码示例，尤其是。对于收音机：
simple_radios.py
from reportlab.pdfgen import canvas
from reportlab.pdfbase import pdfform
from reportlab.lib.colors import magenta, pink, blue, green
def create_simple_radios():
c = canvas.Canvas('simple_radios.pdf')
c.setFont("Courier", 20)
c.drawCentredString(300, 700, 'Radio demo')
c.setFont("Courier", 14)
form = c.acroForm
c.drawString(10, 650, 'Dog:')
form.radio(name='radio1', tooltip='Field radio1',
value='value1', selected=False,
x=110, y=645, buttonStyle='check',
borderStyle='solid', shape='square',
borderColor=magenta, fillColor=pink,
textColor=blue, forceBorder=True)
form.radio(name='radio1', tooltip='Field radio1',
value='value2', selected=True,
x=110, y=645, buttonStyle='check',
borderStyle='solid', shape='square',
borderColor=magenta, fillColor=pink,
textColor=blue, forceBorder=True)
c.drawString(10, 600, 'Cat:')
form.radio(name='radio2', tooltip='Field radio2',
value='value1', selected=True,
x=110, y=595, buttonStyle='cross',
borderStyle='solid', shape='circle',
borderColor=green, fillColor=blue,
borderWidth=2,
textColor=pink, forceBorder=True)
form.radio(name='radio2', tooltip='Field radio2',
value='value2', selected=False,
x=110, y=595, buttonStyle='cross',
borderStyle='solid', shape='circle',
borderColor=green, fillColor=blue,
borderWidth=2,
textColor=pink, forceBorder=True)
c.drawString(10, 550, 'Pony:')
form.radio(name='radio3', tooltip='Field radio3',
value='value1', selected=False,
x=110, y=545, buttonStyle='star',
borderStyle='bevelled', shape='square',
borderColor=blue, fillColor=green,
borderWidth=2,
textColor=magenta, forceBorder=False)
form.radio(name='radio3', tooltip='Field radio3',
value='value2', selected=True,
x=110, y=545, buttonStyle='star',
borderStyle='bevelled', shape='circle',
borderColor=blue, fillColor=green,
borderWidth=2,
textColor=magenta, forceBorder=True)
c.save()
if __name__ == '__main__':
create_simple_radios()
我的 problem/question 代码是： 1.) 收音机始终处于 "pushed" 状态。我怎样才能取消他们？ 2.) 可以分组，以便根据一个组只按下一 (1) 个单选按钮 3.) 我以后如何以编程方式读取按钮的状态，例如通过 PyPDF2?
版本：
Python: 3.7.3
报告实验室：3.5.19
枕头：6.0.0
PyPDF2：1.26.0
OS:
Windows10 v1809
1.) The radios are always in a "pushed" state. How can I unpush them?
按钮被按下如果 form.radio(... selected=True)
2.) Can the be grouped, so that only ONE (1) radio button is pushed according to a group?
name属性与组名相关。
所以form.radio(... name="group1")是一组form.radio(... name="group2")是第二组。 每组只能select一个收音机。
所以对于前两个问题，我创建了一个包含两个不同组的简单示例。
第一组 group 包含 Fruits 第二组包含 Cars:
from reportlab.pdfgen import canvas
from reportlab.pdfbase import pdfform
from reportlab.lib.colors import magenta, pink, blue, green, orange, yellow
def create_radios():
c = canvas.Canvas('radios.pdf')
c.setFont("Courier", 20)
c.drawCentredString(300, 800, 'Radio demo')
form = c.acroForm
#GROUP ONE, name='group1'
c.setFont("Courier", 16)
c.drawString(10, 680, 'Fruits:')
c.setFont("Courier", 12)
c.drawString(10, 650, 'Apple:')
form.radio(name='group1', tooltip='Apple',
value='apple', selected=False,
x=110, y=650, buttonStyle='check',
borderStyle='solid', shape='square',
borderColor=blue, fillColor=magenta,
textColor=blue, forceBorder=True)
c.drawString(10, 600, 'Banana:')
form.radio(name='group1', tooltip='Banana',
value='banana', selected=False,
x=110, y=600, buttonStyle='check',
borderStyle='solid', shape='square',
borderColor=blue, fillColor=yellow,
textColor=blue, forceBorder=True)
c.drawString(10, 550, 'Orange:')
form.radio(name='group1', tooltip='Orange',
value='orange', selected=False,
x=110, y=550, buttonStyle='check',
borderStyle='solid', shape='square',
borderColor=blue, fillColor=orange,
textColor=blue, forceBorder=True)
#GROUP TWO, name='group2'
c.setFont("Courier", 16)
c.drawString(210, 680, 'Cars:')
c.setFont("Courier", 12)
c.drawString(210, 650, 'Tesla:')
form.radio(name='group2', tooltip='Apple',
value='tesla', selected=False,
x=310, y=650, buttonStyle='circle',
borderStyle='solid', shape='circle',
borderColor=blue, fillColor=magenta,
textColor=blue, forceBorder=False)
c.drawString(210, 600, 'Mercedes-Benz:')
form.radio(name='group2', tooltip='Banana',
value='mercedes', selected=False,
x=310, y=600, buttonStyle='circle',
borderStyle='solid', shape='circle',
borderColor=blue, fillColor=magenta,
textColor=blue, forceBorder=False)
c.drawString(210, 550, 'Toyota:')
form.radio(name='group2', tooltip='Orange',
value='toyota', selected=False,
x=310, y=550, buttonStyle='circle',
borderStyle='solid', shape='circle',
borderColor=blue, fillColor=magenta,
textColor=blue, forceBorder=False)
c.save()
if __name__ == '__main__':
create_radios()
3.) How could I read the state of the buttons later on programmatically e.g. via PyPDF2?
我找到了一种更简单的方法，然后使用 PyPDF2 返回的字段数据...
使用pdfminer就可以很好的解决问题。
创建 radios.pdf 后，我使用 Adobe 更改了值并将其保存为新文件 radios_checked.pdf 您也可以更改每个组的一个 selected 属性。
import sys
from pdfminer.pdfparser import PDFParser
from pdfminer.pdfdocument import PDFDocument
from pdfminer.pdftypes import resolve1
filename = "radios_checked.pdf"
with open(filename, 'rb') as pdf_file:
parser = PDFParser(pdf_file)
doc = PDFDocument(parser)
fields = resolve1(doc.catalog['AcroForm'])['Fields']
for i in fields:
field = resolve1(i)
name = str(field.get('T'), 'utf-8')
value = field.get('V') #will return PSLiteral :/
# transform PSLiteral to string
if value != None:
value = str(value)
if value[0] == r"/":
value = value[2:-1]
value = str(value)
print("Group Name: {0}, checked value: {1} ".format(name , value))
这将过滤所有组对象并打印出 selected 组名称和 selected 值。
提示：
在文本编辑器中打开一个 pdf 并检查一般结构。