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Tk getcoords returns empty list

I have a python program at https://pastebin.com/x7K2tBTG
My problem is when i run it, i get the following errors:
Traceback (most recent call last):
File "some/file.py", line 88, in <module>
clean_up_bubs()
File "some/file.py", line 76, in clean_up_bubs
x, y = get_coords(bub_id[i])
File "some/file.py", line 65, in get_coords
x = (pos[0] + pos[2]) / 2
IndexError: list index out of range
I've done some investigating and it turns out that at some point when the get_coords function is executed, the c.coords(id_num) gives an empty list. Why does it happen and how can i fix this?

You weren't deleting your bub_id key inside del_bubble() which made it iterate deleted bubbles. Also noticed your reversed loop was missing one bubble, not sure if intentional, but I changed it anyhow:
def del_bubble(i):
del bub_r[i]
del bub_speed[i]
c.delete(bub_id[i])
del bub_id[i] # <-- New line
def clean_up_bubs():
for i in reversed(range(len(bub_id))): # <-- Changed line
x, y = get_coords(bub_id[i])
if x < -GAP:
del_bubble(i)
I like your game so far though! If you want additional tips then I recommend trying to create a Bubble class, should make it a lot easier to work with

Code error with variable storage from selected feature

I'm using QGIS 3.6 with the built in Python text editor. I have found a snippet of code that I'm trying to make work, and I've modified it to the best of my abilities to fit my specific needs. I have a point layer called "Regulators" and it contains a field called "Town". The idea of the code is that when I select a single feature on the "Regulators" layer, the code will look at the "Town" field, and select all other features that match that field's value. I select a feature, run this code:
layer = iface.activeLayer()
field_name = 'Town'
values = []
for feat in layer.selectedFeatures():
tmp_value = feat[field_name]
if tmp_value not in values:
values.append(str(tmp_value))
strings = []
for val in values:
if val != values[-1]:
string = field_name + ' = ' + val + ' or '
strings.append(string)
else:
last_string = field_name + ' = ' + val
strings.append(last_string)
query = ''.join(strings)
request = QgsFeatureRequest().setFlags(QgsFeatureRequest.NoGeometry)
request.setSubsetOfAttributes([]).setFilterExpression(query)
selection = layer.getFeatures(request)
layer.setSelectedFeatures([k.id() for k in selection])
and I get this error:
Traceback (most recent call last):
File "C:\PROGRA~1\QGIS3~1.6\apps\Python37\lib\code.py", line 90, in runcode
exec(code, self.locals)
File "<input>", line 1, in <module>
File "<string>", line 24, in <module>
AttributeError: 'QgsVectorLayer' object has no attribute 'setSelectedFeatures'
I'm very much new to python, and see nothing wrong with line 1 or 5. I have found some other codes that do what I'm attempting here, but they also return errors, so I'm wondering if there is some method or function that has changed since this code was posted. The integrated compiler with QGIS is also much different than I am used to.
EDIT: I've updated the code and the error message based on feedback I've received on the post so far. I assume that QgsVectorLayer is the generic term for a vector layer being referenced, in this case the "Regulators" layer. but I don't understand why it's trying to use the setSelectedFeatures method as an attribute.

list index out of range error (second time)

This code works for the first line of the input file but fails in the second trial and I don't know why. I tried to see if there are similar questions but I didn't found a solution.
carac=":"
fichier = open("test", "r")
for i in range(2):
time.sleep(0.5)
chaine = fichier.readline().split(carac)
print(chaine[0])
driver = webdriver.Chrome(r'C:\Users\bh\Downloads\chromedriver')
driver.get('https://www.twitter.com/login')
username_box = driver.find_element_by_class_name('js-username-field')
username_box.send_keys(chaine[0])
password_box = driver.find_element_by_class_name('js-password-field')
password_box.send_keys(chaine[1])
I have this error:
Traceback (most recent call last):
File "C:/Users/bh/PycharmProjects/test/twitter.py", line 199, in <module>
password_box.send_keys(chaine[1])
IndexError: list index out of range
ps: the document is a .txt
in the document there is something like this :
test#gmail.com:pass
test#gmail.com:pass

this happens because you havent assigned a value to chaine[1].
You need to declare it before you use it. Why you use a sleep function?
print chaine[1] to see if its empty or not

Sage for Graph Theory, KeyError

I'll start with my code, because this may just be an obvious problem to those with better understanding of the language:
g = graphs.CompleteGraph(60).complement()
for i in range(1,180):
a = randint(0,59)
b = randint(0,59)
h = copy(g)
h.add_edge(a,b)
if h.is_circular_planar():
g.add_edge(a,b)
strong = copy(strong_resolve(g))
S = strong.vertex_cover()
d = {'#00FF00': [], '#FF0000': []}
for v in G.vertices():
if v in S:
d['#FF0000'].append(v)
else:
d['#00FF00'].append(v)
g.plot(layout="spring", vertex_colors=d).show()
strong.plot(vertex_colors=d).show()
new_strong = copy(strong)
for w in new_strong.vertices():
if len(new_strong.neighbors(w)) == 0: #trying to remove
new_strong.delete_vertex(w) #disconnected vertices
new_strong.plot(vertex_colors=d).show()
A couple notes: strong_resolve is a function which takes in a graph and outputs another graph. The first two blocks of code work fine.
My problem is that once I add the third block things don't work anymore. In fiddling around I've gotten variants of this code that when added cause errors, and when removed the errors remain somehow. What happens now is that the for loop seems to go until its end and only then it will give the following error:
Traceback (most recent call last): if h.is_circular_planar():
File "", line 1, in <module>
File "/tmp/tmprzreop/___code___.py", line 30, in <module>
exec compile(u'new_strong.plot(vertex_colors=d).show()
File "", line 1, in <module>
File "/usr/lib/sagemath/local/lib/python2.7/site-packages/sage/misc/decorators.py", line 550, in wrapper
return func(*args, **options)
File "/usr/lib/sagemath/local/lib/python2.7/site-packages/sage/graphs/generic_graph.py", line 15706, in plot
return self.graphplot(**options).plot()
File "/usr/lib/sagemath/local/lib/python2.7/site-packages/sage/graphs/generic_graph.py", line 15407, in graphplot
return GraphPlot(graph=self, options=options)
File "/usr/lib/sagemath/local/lib/python2.7/site-packages/sage/graphs/graph_plot.py", line 247, in __init__
self.set_vertices()
File "/usr/lib/sagemath/local/lib/python2.7/site-packages/sage/graphs/graph_plot.py", line 399, in set_vertices
pos += [self._pos[j] for j in vertex_colors[i]]
KeyError: 0
this can vary in that KeyError: 0 is occasionally 1 or 2 depending on some unknown factor.
I apologize in advance for my horrible code and acknowledge that I really have no idea what I'm doing but I'd really appreciate if someone could help me out here.

I figured it out! It turns out the error came from d having entries that made no sense in new_strong, namely those for vertices that were deleted already. This caused the key error when plot() tried to colour the vertices according to d.

Substring in Python, what is wrong here?

I'm trying to simulate a substring in Python but I'm getting an error:
length_message = len(update)
if length_message > 140:
length_url = len(short['url'])
count_message = 140 - length_url
update = update["msg"][0:count_message] # Substring update variable
print update
return 0
The error is the following:
Traceback (most recent call last):
File "C:\Users\anlopes\workspace\redes_sociais\src\twitterC.py", line 54, in <module>
x.updateTwitterStatus({"url": "http://xxx.com/?cat=49s", "msg": "Searching for some ....... tips?fffffffffffffffffffffffffffffdddddddddddddddddddddddddddddssssssssssssssssssssssssssssssssssssssssssssssssssseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeedddddddddddddddddddddddddddddddddddddddddddddddfffffffffffffffffffffffffffffffffffffffffffff "})
File "C:\Users\anlopes\workspace\redes_sociais\src\twitterC.py", line 35, in updateTwitterStatus
update = update["msg"][0:count_message]
TypeError: string indices must be integers
I can't do this?
update = update["msg"][0:count_message]
The variable "count_message" return "120"
Give me a clue.
Best Regards,
UPDATE
I make this call, update["msg"] comes from here
x = TwitterC()
x.updateTwitterStatus({"url": "http://xxxx.com/?cat=49", "msg": "Searching for some ...... ....?fffffffffffffffffffffffffffffdddddddddddddddddddddddddddddssssssssssssssssssssssssssssssssssssssssssssssssssseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeedddddddddddddddddddddddddddddddddddddddddddddddfffffffffffffffffffffffffffffffffffffffffffffddddddddddddddddd"})

Are you looping through this code more than once?
If so, perhaps the first time through update is a dict, and update["msg"] returns a string. Fine.
But you set update equal to the result:
update = update["msg"][0:int(count_message)]
which is (presumably) a string.
If you are looping, the next time through the loop you will have an error because now update is a string, not a dict (and therefore update["msg"] no longer makes sense).
You can debug this by putting in a print statement before the error:
print(type(update))
or, if it is not too large,
print(repr(update))