Inf - Python function templates

Read and clean FASTA sequence function

def read():
	filename = input("Name of the file you want to use: ")
	vol_seq = []
    temp_seq = ""
    with open(filename, "r", encoding="utf-8") as file:
        for regel in file:
            if ">" not in regel:
                temp_seq += regel.strip()
            else:
                if temp_seq:
                    vol_seq.append(temp_seq)
                temp_seq = ""
        vol_seq.append(temp_seq)
    print(vol_seq)
    return vol_seq

CG percentage

def analyse_dna(seq):
    lseq = len(seq)
    A = 0
    T = 0
    C = 0
    G = 0
    for item in seq:
        if item == "A":
            A += 1
        elif item == "T":
            T += 1
        elif item == "G":
            G += 1
        elif item == "C":
            C += 1
    cgp = ((C+G)/lseq)*100
    return cgp