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How to assign strings in a list to another string as a 'shortcut'?

Clarification: The user needs to specify an ID from a displayed list of ID's, how can I simplify the process by numbering the ID's so that the user just has to specify a simple number instead of the whole ID
I have a list ID = ['ekjgnrg','lrkjnk','etc..'] that I need to interact with by inputting the ID later on. The issue is it's a little tedious to type it in. (Copy-pasting would solve this but it doesn't work on mobile due to the way the message with the list is displayed.)
How can I assign a number to each string in the list so that the user can enter '1' instead of 'ekjgnrg' for simplicity? The list gets longer and shorter occasionally, so how can I make it scale to the size of the list?

Not sure how you present to user, but, you can do something like:
ID = ['ekjgnrg', 'lrkjnk', 'etc..']
print('Choose one of:')
for n,item in enumerate(ID):
print(f'{n}: {item}')
n = int(input('Enter ID number: '))
print(f'You choose number "{n}" which is "{ID[n]}".')
This really needs error checking, like gracefully handling if someone enters invalid data like "foo" or "1000"...
Results in:
Choose one of:
0: ekjgnrg
1: lrkjnk
2: etc..
Enter ID number: 1
You choose number "1" which is "lrkjnk".

You can access the Nth item using my_list[n] (in your case my_list is ID).
I suggest you to read: Python - Access List Items - W3Schools to understand how to work with list or other data structure in Python.

is this what you mean? if not, please elaborate more.
ID = ['ekjgnrg','lrkjnk','etc..']
print(ID)
needed_id = int(input("What item do you want from the above list?"))
needed_id -= 1 # since lists start at 0.
print(ID[needed_id])
when run:
['ekjgnrg', 'lrkjnk', 'etc..']
What item do you want from the above list?1
ekjgnrg

Keep track of items in dynamic programming(similar to Knapsack problem)

Hello I'm trying to solve this dp problem: https://vjudge.net/problem/UVA-990
I'm able to solve the initial problem result using this code below:
I used recursion and a memo table arr to optimize the code.
s=list(map(int,input().split()))
t=s[0] #seconds allowed under water
w=s[1] #w
n=int(input()) #number of treasures
depth=[-1]
gold=[-1]
time=[-1]
for i in range(3):
q=list(map(int,input().split()))
depth.append(q[0])
gold.append(q[1])
time.append(q[0]*w*3)
arr = [[-1]*(t+1) for i in range(0,(n+1))]
def maxGold(n,T):
if n==0 or T==0:
return 0
if arr[n][T]!=-1:
return arr[n][T]
if time[n]>T:
answer=maxGold(n-1,T)
else:
answer=max(maxGold(n-1,T),gold[n]+maxGold(n-1,T-time[n]))
arr[n][T]=answer
return answer
result=maxGold(n,t)
print(result)
However I have no idea how to keep track of the chosen items.
I was thinking to store all indices of chosen treasures of the maxGold() output and print them later in a loop for instance.
One approach I had was to add a paramter to the maxGold() function and append to it the indices and return two result and the indices list from the function like the following:
def maxGold(n,T,l):
if n==0 or T==0:
return 0,l
if arr[n][T]!=-1:
return arr[n][T],l
if time[n]>T:
answer=maxGold(n-1,T,l)
else:
l2=l[:]
l2.append(n)
answer=max(maxGold(n-1,T,l)[0],gold[n]+maxGold(n-1,T-time[n],l2)[0])
arr[n][T]=answer
return answer,l
result=maxGold(n,t,[])
print(result[0])
list_of_indices=result[1]
length=len(list_of_indices)
#proceed outputs
However I ran into many tuple/integer type, subscriptable,iteratable errors. from this specific line even after trying to get a round the tuple output due to several outputs :
answer=max(maxGold(n-1,T,l)[0],gold[n]+maxGold(n-1,T-time[n],l2)[0])
And honestly I'm uncertain whether this approach is the right one.
Any hints?

Python issue with replace statement?

I've been write this practice program for while now, the whole purpose of the code is to get user input and generate passwords, everything almost works, but the replace statements are driving me nuts. Maybe one of you smart programmers can help me, because I'm kinda new to this whole field of programming. The issue is that replace statement only seems to work with the first char in Strng, but not the others one. The other funcs blower the last run first and then the middle one runs.
def Manip(Strng):
#Strng = 'jayjay'
print (Strng.replace('j','h',1))
#Displays: 'hayjay'
print (Strng.replace('j','h',4))
#Displays: 'hayhay'
return
def Add_nums(Strng):
Size=len(str(Strng))
Total_per = str(Strng).count('%')
# Get The % Spots Position, So they only get replaced with numbers during permutation
currnt_Pos = 0
per = [] # % position per for percent
rGen = ''
for i in str(Strng):
if i == str('%'):
per.append(currnt_Pos)
currnt_Pos+=1
for num,pos in zip(str(self.ints),per):
rGen = Strng.replace(str(Strng[pos]),str(num),4);
return rGen
for pos in AlphaB: # DataBase Of The Positions Of Alphabets
for letter in self.alphas: #letters in The User Inputs
GenPass=(self.forms.replace(self.forms[pos],letter,int(pos)))
# Not Fully Formatted yet; you got something like Cat%%%, so you can use another function to change % to nums
# And use the permutations function to generate other passwrds and then
# continue to the rest of this for loop which will generate something like cat222 or cat333
Add_nums(GenPass) # The Function That will add numbers to the Cat%%%
print (rGen);exit()

Transposition Cipher in Python

Im currently trying to code a transposition cipher in python. however i have reached a point where im stuck.
my code:
key = "german"
length = len(key)
plaintext = "if your happy and you know it clap your hands, clap your hands"
Formatted = "".join(plaintext.split()).replace(",","")
split = split_text(formatted,length)
def split_text(formatted,length):
return [formatted[i:i + length] for i in range(0, len(formatted), length)]
def encrypt():
i use that to count the length of the string, i then use the length to determine how many columns to create within the program. So it would create this:
GERMAN
IFYOUR
HAPPYA
NDYOUK
NOWITC
LAPYOU
RHANDS
CLAPYO
URHAND
S
this is know where im stuck. as i want to get the program to create a string by combining the columns together. so it would combine each column to create:
IHNNLRCUSFADOAHLRYPYWPAAH .....
i know i would need a loop of some sort but unsure how i would tell the program to create such a string.
thanks

you can use slices of the string to get each letter of the string in steps of 6 (length)
print(formatted[0::length])
#output:
ihnnlrcus
Then just loop through all the possible start indices in range(length) and link them all together:
def encrypt(formatted,length):
return "".join([formatted[i::length] for i in range(length)])
note that this doesn't actually use split_text, it would take formatted directly:
print(encrypt(formatted,length))
the problem with using the split_text you then cannot make use of tools like zip since they stop when the first iterator stops (so because the last group only has one character in it you only get the one group from zip(*split))
for i in zip("stuff that is important","a"):
print(i)
#output:
("s","a")
#nothing else, since one of the iterators finished.
In order to use something like that you would have to redefine the way zip works by allowing some of the iterators to finish and continue until all of them are done:
def myzip(*iterators):
iterators = tuple(iter(it) for it in iterators)
while True: #broken when none of iterators still have items in them
group = []
for it in iterators:
try:
group.append(next(it))
except StopIteration:
pass
if group:
yield group
else:
return #none of the iterators still had items in them
then you can use this to process the split up data like this:
encrypted_data = ''.join(''.join(x) for x in myzip(*split))

Nested Loop 'If'' Statement Won't Print Value of Tuple

Current assignment is building a basic text adventure. I'm having trouble with the following code. The current assignment uses only functions, and that is the way the rules of the assignment state it must be done.
def make_selections(response):
repeat = True
while repeat == True:
selection = raw_input('-> ')
for i, v in enumerate(response):
i +=1 # adds 1 to the index to make list indices correlate to a regular 1,2,3 style list
if selection == i:
print v[1]
else:
print "There's an error man, what are you doing?!?!?"
firstResponse = 'You chose option one.'
secondResponse = 'You chose option two.'
thirdResponse = 'You chose option three.'
responses = [(0, firstResponse), (1, secondResponse),( 0, thirdResponse)]
make_selections(responses)
My intention in that code is to make it so if the user selects a 1, it will return firstResponse, if the user selects 2 it will return secondResponse, etc.
I am basically just bug testing the code to make sure it produces the appropriate response, hence the "Error man..." string, but for some reason it just loops through the error message without printing the appropriate response string. Why is this?
I know that this code is enumerating the list of tuples and I can call them properly, as I can change the code to the following and get the expected output:
for i, v in enumerate(response):
i += 1 # adds 1 to the index to make list indices correlate to a regular 1,2,3 style list
print i, v
Also, two quick asides before anyone asks:
I know there is currently no way to get out of this while loop. I'm just making sure each part of my code works before I move on to the next part. Which brings me to the point of the tuples.
When I get the code working, a 0 will produce the response message and loop again, asking the user to make a different selection, whereas a 1 will produce the appropriate response, break out of the loop, and move on to the next 'room' in the story... this way I can have as many 'rooms' for as long of a story as I want, the player does not have to 'die' each time they make an incorrect selection, and each 'room' can have any arbitrary amount of options and possible responses to choose from and I don't need to keep writing separate loops for each room.

There are a few problems here.
First, there's no good reason to iterate through all the numbers just to see if one of them matches selection; you already know that will be true if 1 <= selection <= len(response), and you can then just do response[selection-1] to get the v. (If you know anything about dicts, you might be able to see an even more convenient way to write this whole thing… but if not, don't worry about it.)
But if you really want to do this exhaustive search, you shouldn't print out There is an error man after any mismatch, because then you're always going to print it at least twice. Instead, you want to only print it if all of them failed to match. You can do this by keeping track of a "matched" flag, or by using a break and an else: clause on your for loop, whichever seems simpler, but you have to do something. See break and continue Statements, and else Clauses on Loops in the tutorial for more details.
But the biggest problem is that raw_input returns a string, and there's no way a string is ever going to be equal to a number. For example, try '1' == 1 in your interactive interpreter, and it'll say False. So, what you need to do is convert the user's input into a number so you can compare it. You can do that like this:
try:
selection = int(selection)
except ValueError:
print "That's not a number!"
continue

Seems like this is a job for dictionaries in python. Not sure if your assignment allows this, but here's my code:
def make_selections(response):
selection = raw_input('-> ')
print response.get(selection, err_msg)
resp_dict = {
'1':'You chose option one.',
'2':'You chose option two.',
'3':'You chose option three.'
}
err_msg = 'Sorry, you must pick one of these choices: %s'%sorted(resp_dict.keys())
make_selections(resp_dict)

The problem is that you are comparing a string to an integer. Selection is raw input, so it comes in as a str. Convert it to an int and it will evaluate as you expect.
You can check the type of a variable by using type(var). For example, print type(selection) after you take the input will return type 'str'.
def make_selections(response):
repeat = True
while repeat == True:
selection = raw_input('-> ')
for i, v in enumerate(response):
i +=1 # adds 1 to the index to make list indices correlate to a regular 1,2,3 style list
if int(selection) == i:
print v[1]
else:
print "There's an error man, what are you doing?!?!?"