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Compare 2 lists and output the similar matches [closed]

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I have 2 Python lists :
prefixList = ["12","9"]
files = ["12-a.csv","12-b.csv","9-t.txt","8-a.txt"]
and want to create a new list with a list of files that start with the prefix list, so the output will be:
fileOutput = ["12-a.csv","12-b.csv","9-t.txt"]

You can use regex and find number and search number in prefixList.
prefixList = ["12","9"]
files = ["12-a.csv","12-b.csv","9-t.txt","8-a.txt"]
new_files = [file
for file in files
if(re.search(r'\d+', file).group(0) in prefixList)]
print(new_files)
Output:
['12-a.csv', '12-b.csv', '9-t.txt']

How do I get all first elements of python dictionary? [closed]

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I used dictionaries the first time and I can't figure out how to get all first elements of a dictionary. The picture shows an example of my problem. I want to get the brand names, not "brand0, brand1" etc.
thisdict = {
"brand0": ("Ford", "green_car"),
"brand1": ("Audi", "yellow_car"),
"brand2": ("Porsche", "red_car")
}

You can use several aproaches to this problem but the easiest is probably this
firstItems = [value[0] for value in thisdict.values()]
this works the same as
firstItems = []
for value in thisdict.values():
firstItems.append(value[0])

is there an python method for solve this list index error? [closed]

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I have error that say: the list index out of range ?
equal_score = []
for i, j in enumerate(new_gd):
if i > len(new_gd):
break
if new_gd[i]['score'] == new_gd[i+1]['score']:
equal_score.append(new_gd[i])
equal_score.append(new_gd[i+1])'

Since you refer to the index i+1 you should do if i+1 >= len(new_gd): break so you make sure i+1 exists.

Trying to exctract a char from a list [closed]

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So I have a list of chars like
nodeList = ['A','C','E','G']
and I want to extract the A. So I found the list[number] method for extracting from a list. But when I put
node = nodeList[0]
I get an error saying that "'dict_keys' object does not support indexing." So how can I work around this? Thanks.

As stated in the comments, nodeList is not actually a list, but a dict_keys object. Before trying to index it, you may simply convert it to a list:
nodeList = list(nodeList)
node = nodeList[0]

Read 2d array and list result in Python [closed]

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I have following 2D array
name_list = [['Orange', '5'],['Mango','6'],['Banana','3']]
I want to get each fruit name alone with its count and print it using a python code. So how do I read above array to extract the data (inside for loop)
I need print out as
Name:Orange<br/>
Count:5<br/>
Name:Mango<br/>
Count:6<br/>
Name:Banana<br/>
Count:3<br/>

You can unpack your list like this:
for name, amount in name_list:
print("Name:{}".format(name))
print("Count:{}".format(amount))

Try this:
name_list = [['Orange', '5'],['Mango','6'],['Banana','3']]
for item in name_list:
print("Name: {}".format(item[0]))
print("Count: {}".format(item[1]))