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Python XPath selector not working with selenium

I tried to automate some inputs. For this I need to input some text after the tag.
To identify the place where to input I tried XPath for fowlloing HTML code.
<span data-offset-key="1dq3m-0-0">
<br data-text="true">
</span>
Here is what I wrote in python.
buf_comp_text = 'foobar'
el_xp_comp_text = '//*[#data-text]'
...
## create post in queue (comment)
print('create post in queue - text')
post_txt = driver.find_element_by_xpath(el_xp_comp_text).send_keys(buf_comp_text)
Unfortunately I alwas get error message:
selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"xpath","selector":"//*[#data-text]"}
Any hint is appreciated.

Instead of targetting the <br> tag you need to target the <span> tag you can use the following Locator Strategy:
Using css_selector:
buf_comp_text = 'foobar'
driver.find_element_by_css_selector("span[data-offset-key]").send_keys(buf_comp_text)
Using xpath:
buf_comp_text = 'foobar'
driver.find_element_by_xpath("//span[#data-offset-key][.//br[#data-text]]").send_keys(buf_comp_text)
Ideally, to send a character sequence to the element you need to induce WebDriverWait for the element_to_be_clickable() and you can use either of the following Locator Strategy:
Using CSS_SELECTOR:
buf_comp_text = 'foobar'
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "span[data-offset-key]"))).send_keys(buf_comp_text)
Using XPATH:
buf_comp_text = 'foobar'
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//span[#data-offset-key][.//br[#data-text]]"))).send_keys(buf_comp_text)
Note: You have to add the following imports :
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC
Reference
You can find a couple of relevant discussions in:
Ways to deal with #document under iframe
Switch to an iframe through Selenium and python
selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element while trying to click Next button with selenium
selenium in python : NoSuchElementException: Message: no such element: Unable to locate element

Selenium returning NoSuchElementException but the element exists

I am having this code
driver.implicitly_wait(300) # I have tried different timers
driver.find_element_by_xpath("(//button[#aria-pressed='false'])[1]").click()
But I get this error:
selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"xpath","selector":"(//button[#aria-pressed='false'])[1]"}
However, this exists in my HTML content, like:
<div class="webix_el_box" style="width:90px; height:26px">
<button aria-pressed="false" type="button" class="webix_img_btn" style="line-height:22px;">
<span class="webix_icon_btn fa-lock red" style="max-width:22px;">
</span> Read Only
</button>
</div>
I have also tried to use the XPath expression:
//button[#class='webix_img_btn']//child::span[#class='webix_icon_btn fa-lock red']
Both XPath expressions worked fine in Google Chrome.
In the website I am able to find the button using Ctrl + F and 'Read Only', can I use it in Selenium?
It is not working because of Selenium Driver is one page behind ajax call after large json data download.

To click on the element with text as Read Only you have to induce WebDriverWait for the element_to_be_clickable() and you can use either of the following Locator Strategies:
Using CSS_SELECTOR:
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "div.webix_el_box > button.webix_img_btn"))).click()
Using XPATH:
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//div[#class='webix_el_box']/button[#class='webix_img_btn' and contains(., 'Read Only')]"))).click()
Note: You have to add the following imports:
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC
References
You can find a couple of relevant discussions on NoSuchElementException in:
"selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element" while clicking a 'Next' button with Selenium
Selenium in Python: "NoSuchElementException: Message: no such element: Unable to locate element"

Try doing just
driver.implicitly_wait(300)
driver.find_element_by_xpath("//button[#aria-pressed='false']").click()
This will click on the first element that satisfies the requirements.

How to identify the nested element using Selenium and Python

I have a nested element possibly within <svg> that I can't seems to access
I tried using
driver.find_element(By.CSS_SELECTOR, 'button.login-fake-btn')
and
driver.find_element(By.CSS_SELECTOR, 'login-fake-btn')
and a few others.
HTML structure of nested svg:
<svg class="1">
<div id="2">
<div>
<div class="3">
<div class="4">
<li>
<button class="5" type="button" id="login-fake-btn">
...closing tags
Snapshot of HTML:
I have no success with xpath either.
Error:
selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"css selector","selector":"button.login-fake-btn"}
How do I get to a nested svg using a css selector (or xpath, but I understand css to be better)?

It's a <button> element and it's out of the <svg> tag and possibly moving forward you'd invoke click() on it. Hence to locate the element you have to induce WebDriverWait for the element_to_be_clickable() and you can use either of the following Locator Strategies:
Using CSS_SELECTOR:
element = WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "button.login-btn.btn-shadow#login-fake-btn[data-testid='login-fake-btn']")))
Using XPATH:
element = WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//button[#class='login-btn btn-shadow' and #id='login-fake-btn'][#data-testid='login-fake-btn']")))
Note : You have to add the following imports:
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC
References
You can find a couple of relevant discussions on NoSuchElementException in:
selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element while trying to click Next button with selenium
selenium in python : NoSuchElementException: Message: no such element: Unable to locate element

How to click on the element with text as Contact using Selenium and Python

I'm using selenium to grab all support page of some site.On one particular page i have one error .
Here the code of the page :
<a href="?a=support" class="">
<span><b></b> Contact</span>
<b></b> Contact
</a>
I'm trying with many try / except condition to find a support page.
try:
print ("FINDING SUPPORT ...")
driver_hyip.find_element_by_css_selector("a[href*='support']").click()
driver_hyip.execute_script("window.alert = function() {};")
except:
try:
print ("NOT FINDING SUPPORT, TRYING ANOTHER WAY")
driver_hyip.find_element_by_xpath("//a[#href='?a=support']").click()
except:
print ("NOT FINDING SUPPORT, TRYING TO FIND CONTACT")
driver_hyip.find_element_by_css_selector("a[href*='contact']").click()
I expected my code find the page, but I got :
Message: no such element: Unable to locate element: {"method":"css selector","selector":"a[href*='contact']"}
PS : Do you know if there is some other way to try multiple path in selenium ? Because here i'm doing lot of try / except in my code.

To click() on the element with text as Contact you need to induce WebDriverWait for the element_to_be_clickable() and you can use either of the following Locator Strategies:
Using CSS_SELECTOR:
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "a[href$='support']>span"))).click()
Using XPATH:
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//a[contains(#href, 'support')]/span"))).click()
Note : You have to add the following imports :
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC

Clicking on HTML <a> tag with selenium python

I try to click on html a tag with selenium but I get an error.
How can I get selenium to click on such tag?
I've tried this code but I get an error:
driver.find_element_by_id("btnCreateJE").click()
HTML code:
<a id="btnCreateJE" data-permission="true" onclick="NewManualJE()" href="#" class="btn waves-effect waves-light"> New </a>
Python selenium code:
driver.find_element_by_id("btnCreateJE").click()
I get that error:
selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"css selector","selector":"[id="btnCreateJE"]"}
(Session info: chrome=75.0.3770.142)

Make sure that the element doesn't belong to the iframe, if this is the case - you will need to switch_to_frame first
Make sure that the element doesn't belong to the Shadow DOM, if this is the case - you will have to find the relevant ShadowRoot and locate your element relatively
It might be the case the link is not immediately present in DOM, i.e. it's being added later as a result of an AJAX call. If this is the case - consider adding Explicit Wait like:
WebDriverWait(driver, 10).until(expected_conditions.presence_of_element_located((By.ID, "btnCreateJE"))).click()

The desired element is a JavaScript enabled element so to click() on the element you have to induce WebDriverWait for the element to be clickable and you can use either of the following solutions:
Using PARTIAL_LINK_TEXT:
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.PARTIAL_LINK_TEXT, "New"))).click()
Using CSS_SELECTOR:
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "a.btn.waves-effect.waves-light#btnCreateJE[onclick^='NewManualJE']"))).click()
Using XPATH:
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//a[#class='btn waves-effect waves-light' and #id='btnCreateJE'][starts-with(#onclick, 'NewManualJE')]"))).click()
Note : You have to add the following imports :
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC