Selenium InvalidSelectorException caused by single quote (python)










1















I have trouble selecting an element using selenium webdriver.
I am trying to get the "Student's Book" and then click the start button that belongs to it. There are several books with similar title and it's important to get exactly this book in particular. using id's to find the element does not work, because they are being generated and do not always look the same.



the html looks as follows:






<table style="margin: 0; width: 100%;">
<tbody>
<tr>
<td><img src="/image/db/prod/pic.jpg" alt=""></td>
<td style="padding: 0; vertical-align: top; position: relative;">
<h3 class="top0" style="width: 200px;" id="crp_title_254">Student's Book</h3>
<hr><a class="linkButton orangeLinkButton bold" href="some_link">Start</a>
<a class="btn_crpdel" id="btn_crpdel_254"><img class="style-del" src="/styles/pic/style-del.png" alt="-" style="width: 23px; height: 23px;"></a>
</td>
</tr>
</tbody>
</table>





the python part looks like this with the material variable holding the value "Student's Book":



try:
#material = "Student's Book"
start_link = self.browser.find_element(By.XPATH, "//h3[text()='" + material + "']/following::a[contains(text(), launch_button[self.INTERFACE_LANGUAGE])]")
start_link.click()
except Exception as e:
Exceptionhandling...


when running the above code the following exception occurs:



InvalidSelectorException('Given xpath expression "//h3[text()='Student Book's']/following::a[contains(text(), launch_button[self.INTERFACE_LANGUAGE])]" is invalid: SyntaxError: The expression is not a legal expression.', None, None)


The whole thing works perfectly fine if there is no single quote in it.
Does anybody know what i am doing wrong?



thanks in advance!










share|improve this question



















  • 1





    Have you tried to put the text inside double quotes? //h3[text()="'Student Book's'"]

    – Daniel Corzo
    Nov 15 '18 at 17:04











  • @DanielCorzo Thanks for your answer. unfortunately this did not work.

    – semmelbroesl
    Nov 16 '18 at 7:01
















1















I have trouble selecting an element using selenium webdriver.
I am trying to get the "Student's Book" and then click the start button that belongs to it. There are several books with similar title and it's important to get exactly this book in particular. using id's to find the element does not work, because they are being generated and do not always look the same.



the html looks as follows:






<table style="margin: 0; width: 100%;">
<tbody>
<tr>
<td><img src="/image/db/prod/pic.jpg" alt=""></td>
<td style="padding: 0; vertical-align: top; position: relative;">
<h3 class="top0" style="width: 200px;" id="crp_title_254">Student's Book</h3>
<hr><a class="linkButton orangeLinkButton bold" href="some_link">Start</a>
<a class="btn_crpdel" id="btn_crpdel_254"><img class="style-del" src="/styles/pic/style-del.png" alt="-" style="width: 23px; height: 23px;"></a>
</td>
</tr>
</tbody>
</table>





the python part looks like this with the material variable holding the value "Student's Book":



try:
#material = "Student's Book"
start_link = self.browser.find_element(By.XPATH, "//h3[text()='" + material + "']/following::a[contains(text(), launch_button[self.INTERFACE_LANGUAGE])]")
start_link.click()
except Exception as e:
Exceptionhandling...


when running the above code the following exception occurs:



InvalidSelectorException('Given xpath expression "//h3[text()='Student Book's']/following::a[contains(text(), launch_button[self.INTERFACE_LANGUAGE])]" is invalid: SyntaxError: The expression is not a legal expression.', None, None)


The whole thing works perfectly fine if there is no single quote in it.
Does anybody know what i am doing wrong?



thanks in advance!










share|improve this question



















  • 1





    Have you tried to put the text inside double quotes? //h3[text()="'Student Book's'"]

    – Daniel Corzo
    Nov 15 '18 at 17:04











  • @DanielCorzo Thanks for your answer. unfortunately this did not work.

    – semmelbroesl
    Nov 16 '18 at 7:01














1












1








1








I have trouble selecting an element using selenium webdriver.
I am trying to get the "Student's Book" and then click the start button that belongs to it. There are several books with similar title and it's important to get exactly this book in particular. using id's to find the element does not work, because they are being generated and do not always look the same.



the html looks as follows:






<table style="margin: 0; width: 100%;">
<tbody>
<tr>
<td><img src="/image/db/prod/pic.jpg" alt=""></td>
<td style="padding: 0; vertical-align: top; position: relative;">
<h3 class="top0" style="width: 200px;" id="crp_title_254">Student's Book</h3>
<hr><a class="linkButton orangeLinkButton bold" href="some_link">Start</a>
<a class="btn_crpdel" id="btn_crpdel_254"><img class="style-del" src="/styles/pic/style-del.png" alt="-" style="width: 23px; height: 23px;"></a>
</td>
</tr>
</tbody>
</table>





the python part looks like this with the material variable holding the value "Student's Book":



try:
#material = "Student's Book"
start_link = self.browser.find_element(By.XPATH, "//h3[text()='" + material + "']/following::a[contains(text(), launch_button[self.INTERFACE_LANGUAGE])]")
start_link.click()
except Exception as e:
Exceptionhandling...


when running the above code the following exception occurs:



InvalidSelectorException('Given xpath expression "//h3[text()='Student Book's']/following::a[contains(text(), launch_button[self.INTERFACE_LANGUAGE])]" is invalid: SyntaxError: The expression is not a legal expression.', None, None)


The whole thing works perfectly fine if there is no single quote in it.
Does anybody know what i am doing wrong?



thanks in advance!










share|improve this question
















I have trouble selecting an element using selenium webdriver.
I am trying to get the "Student's Book" and then click the start button that belongs to it. There are several books with similar title and it's important to get exactly this book in particular. using id's to find the element does not work, because they are being generated and do not always look the same.



the html looks as follows:






<table style="margin: 0; width: 100%;">
<tbody>
<tr>
<td><img src="/image/db/prod/pic.jpg" alt=""></td>
<td style="padding: 0; vertical-align: top; position: relative;">
<h3 class="top0" style="width: 200px;" id="crp_title_254">Student's Book</h3>
<hr><a class="linkButton orangeLinkButton bold" href="some_link">Start</a>
<a class="btn_crpdel" id="btn_crpdel_254"><img class="style-del" src="/styles/pic/style-del.png" alt="-" style="width: 23px; height: 23px;"></a>
</td>
</tr>
</tbody>
</table>





the python part looks like this with the material variable holding the value "Student's Book":



try:
#material = "Student's Book"
start_link = self.browser.find_element(By.XPATH, "//h3[text()='" + material + "']/following::a[contains(text(), launch_button[self.INTERFACE_LANGUAGE])]")
start_link.click()
except Exception as e:
Exceptionhandling...


when running the above code the following exception occurs:



InvalidSelectorException('Given xpath expression "//h3[text()='Student Book's']/following::a[contains(text(), launch_button[self.INTERFACE_LANGUAGE])]" is invalid: SyntaxError: The expression is not a legal expression.', None, None)


The whole thing works perfectly fine if there is no single quote in it.
Does anybody know what i am doing wrong?



thanks in advance!






<table style="margin: 0; width: 100%;">
<tbody>
<tr>
<td><img src="/image/db/prod/pic.jpg" alt=""></td>
<td style="padding: 0; vertical-align: top; position: relative;">
<h3 class="top0" style="width: 200px;" id="crp_title_254">Student's Book</h3>
<hr><a class="linkButton orangeLinkButton bold" href="some_link">Start</a>
<a class="btn_crpdel" id="btn_crpdel_254"><img class="style-del" src="/styles/pic/style-del.png" alt="-" style="width: 23px; height: 23px;"></a>
</td>
</tr>
</tbody>
</table>





<table style="margin: 0; width: 100%;">
<tbody>
<tr>
<td><img src="/image/db/prod/pic.jpg" alt=""></td>
<td style="padding: 0; vertical-align: top; position: relative;">
<h3 class="top0" style="width: 200px;" id="crp_title_254">Student's Book</h3>
<hr><a class="linkButton orangeLinkButton bold" href="some_link">Start</a>
<a class="btn_crpdel" id="btn_crpdel_254"><img class="style-del" src="/styles/pic/style-del.png" alt="-" style="width: 23px; height: 23px;"></a>
</td>
</tr>
</tbody>
</table>






html python-3.x quotes






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share|improve this question













share|improve this question




share|improve this question








edited Nov 16 '18 at 7:05







semmelbroesl

















asked Nov 15 '18 at 16:00









semmelbroeslsemmelbroesl

234




234







  • 1





    Have you tried to put the text inside double quotes? //h3[text()="'Student Book's'"]

    – Daniel Corzo
    Nov 15 '18 at 17:04











  • @DanielCorzo Thanks for your answer. unfortunately this did not work.

    – semmelbroesl
    Nov 16 '18 at 7:01













  • 1





    Have you tried to put the text inside double quotes? //h3[text()="'Student Book's'"]

    – Daniel Corzo
    Nov 15 '18 at 17:04











  • @DanielCorzo Thanks for your answer. unfortunately this did not work.

    – semmelbroesl
    Nov 16 '18 at 7:01








1




1





Have you tried to put the text inside double quotes? //h3[text()="'Student Book's'"]

– Daniel Corzo
Nov 15 '18 at 17:04





Have you tried to put the text inside double quotes? //h3[text()="'Student Book's'"]

– Daniel Corzo
Nov 15 '18 at 17:04













@DanielCorzo Thanks for your answer. unfortunately this did not work.

– semmelbroesl
Nov 16 '18 at 7:01






@DanielCorzo Thanks for your answer. unfortunately this did not work.

– semmelbroesl
Nov 16 '18 at 7:01













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