Looking for the contents of a tag in BeautifulSoup, but it returns blank

Question

The xml I'm trying to parse looks like this:


Port on brain, some functions not working




Sorry, I thought we had already included the code that would be needed. Here is what we have been using for testing. In the code below, the problem is on Port 1 (LeftFrontDriveMotor).
 Here is the code from main.cpp.
 #include “vex.h”
 #include “robot-config.h”
 using namespace vex;
 competition Competiton;
 void leftDrive() {
 LeftFrontDriveMotor.spin(directionType::fwd, Controller1.Axis3.value(),velocityUnits::pct);
 LeftBackDriveMotor.spin(directionType::fwd, Controller1.Axis3.value(),velocityUnits::pct);
 }
 void pre_auton( void ) {
 // Initializing Robot Configuration. DO NOT REMOVE!
 vexcodeInit();
 }
 void autonomous( void ) {
 }
 void usercontrol( void ) {
 while(true) {
 Controller1.Axis3.changed(leftDrive);
 }
 }
 int main() {
 pre_auton();
 Competiton.autonomous( autonomous );
 Competiton.drivercontrol( usercontrol );
 while(true) {
 vex::task::sleep(100);
 }
 }
 And, here is the code from robot-config.cpp
 #include “vex.h”
 using namespace vex;
 // A global instance of brain used for printing to the V5 brain screen
 brain Brain;
 //VEXcode Devices
 controller Controller1 = controller(primary);
 motor LeftFrontDriveMotor (PORT1, ratio18_1,false);
 motor LeftBackDriveMotor (PORT11, ratio18_1,false);
 motor RightFrontDriveMotor (PORT10, ratio18_1,true);
 motor RightBackDriveMotor (PORT20, ratio18_1,true);
 /**
  Used to initialize code/tasks/devices added using tools in VEXcode Text.
  
This should be called at the start of your int main function.
 */
 
 void vexcodeInit(void) {
 // Nothing to initialize
 } ]]>

https://www.vexforum.com/t/port-on-brain-some-functions-not-working/83135/8
Sun, 19 Jul 2020 16:38:10 +0000
www.vexforum.com-post-655101

I need the text in between the two tags, but when I search for

soup.find('dc:creator')

It simply returns with

I think it might have something to do with the <>'s around the text, but I'm not sure.

How do I find the contents of the tag with BeautifulSoup?

Andrej Kesely · Accepted Answer

If you don't have defined XML namespaces, the xml parser will strip them. So you can search by tag:

from bs4 import BeautifulSoup

txt = '''
Port on brain, some functions not working




Sorry, I thought we had already included the code that would be needed. Here is what we have been using for testing. In the code below, the problem is on Port 1 (LeftFrontDriveMotor).
 Here is the code from main.cpp.
 #include “vex.h”
 #include “robot-config.h”
 using namespace vex;
 competition Competiton;
 void leftDrive() {
 LeftFrontDriveMotor.spin(directionType::fwd, Controller1.Axis3.value(),velocityUnits::pct);
 LeftBackDriveMotor.spin(directionType::fwd, Controller1.Axis3.value(),velocityUnits::pct);
 }
 void pre_auton( void ) {
 // Initializing Robot Configuration. DO NOT REMOVE!
 vexcodeInit();
 }
 void autonomous( void ) {
 }
 void usercontrol( void ) {
 while(true) {
 Controller1.Axis3.changed(leftDrive);
 }
 }
 int main() {
 pre_auton();
 Competiton.autonomous( autonomous );
 Competiton.drivercontrol( usercontrol );
 while(true) {
 vex::task::sleep(100);
 }
 }
 And, here is the code from robot-config.cpp
 #include “vex.h”
 using namespace vex;
 // A global instance of brain used for printing to the V5 brain screen
 brain Brain;
 //VEXcode Devices
 controller Controller1 = controller(primary);
 motor LeftFrontDriveMotor (PORT1, ratio18_1,false);
 motor LeftBackDriveMotor (PORT11, ratio18_1,false);
 motor RightFrontDriveMotor (PORT10, ratio18_1,true);
 motor RightBackDriveMotor (PORT20, ratio18_1,true);
 /**
  Used to initialize code/tasks/devices added using tools in VEXcode Text.
  
This should be called at the start of your int main function.
 */
 
 void vexcodeInit(void) {
 // Nothing to initialize
 } ]]>

https://www.vexforum.com/t/port-on-brain-some-functions-not-working/83135/8
Sun, 19 Jul 2020 16:38:10 +0000
www.vexforum.com-post-655101
'''

soup = BeautifulSoup(txt, 'xml')
print(soup.find('creator').get_text(strip=True))

Prints:

@nathankmiles Nathan

Or: You can use html.parser and bs4.CData (txt is your HTML snippet from the question):

from bs4 import BeautifulSoup, CData

soup = BeautifulSoup(txt, 'html.parser')
print(soup.find('dc:creator').find_next(text=lambda x: isinstance(x, CData)).strip())

Prints:

@nathankmiles Nathan

Looking for the contents of a tag in BeautifulSoup, but it returns blank

Answers (2)

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