[英]saving cvs file in python
我無法將數據保存到csv文件中。 我正在嘗試將該基因中的氨基酸分為非極性(np),極性(p),陰性(neg)和陽性(pos)四類。 我已經找到了如何計算所有單個氨基酸並將其保存到cvs文件中的方法,但是無法找出如何以與單個氨基酸相同的方式保存四個組的數據。
這是保存到csv中的單個氨基酸的代碼:
from Bio import Entrez, SeqIO
Entrez.email = ""
handle = Entrez.efetch(db="nucleotide", id="KT191142", rettype="gb", retmode="text")
record = SeqIO.read(handle, "genbank")
handle.close()
protein_seq = record.seq.translate()
print(protein_seq)
def count_aa(seq, csv_file):
aa_dict = {} # dictionary to store amino acid counts
for aa in seq:
if aa in aa_dict:
aa_dict[aa] += 1 # increment the count of an amino acid by 1
else:
aa_dict[aa] = 1 # set the count of an amino acid to 1
with open(csv_file, "w") as file:
aa_list=sorted(aa_dict.keys())
file.write("amino_acid,count\n")
for aa in aa_list:
line = str(aa) + ',' + str(aa_dict[aa]) + '\n'
file.write(line)
count_aa(protein_seq, "ebola_aa_count2.csv")`
我想將此新代碼保存到一個csv文件中,就像之前的代碼一樣,這是新代碼:
import re
handle = Entrez.efetch(db="nucleotide", id="KT191142", rettype="gb", retmode="text")
records = SeqIO.read(handle, "genbank")
handle.close()
protein_seq = records.seq.translate()
print(protein_seq)
np_count = 0
p_count = 0
neg_count = 0
pos_count = 0
for aa in protein_seq:
match_np = re.search(r"G|A|V|C|P|L|I|M|W|F", str(aa))
match_p = re.search(r"S|T|Y|N|Q", str(aa))
match_neg = re.search(r"D|E", str(aa))
match_pos = re.search(r"K|R|H", str(aa))
if match_np:
np_count += 1
if match_p:
p_count += 1
if match_neg:
neg_count += 1
if match_pos:
pos_count += 1
handle.close()
print(np_count, p_count, neg_count, pos_count)
謝謝您的幫助!
您絕對應該使用熊貓來操作csv文件。
import pandas as pd
df = pd.DataFrame(columns = ['np_count', 'p_count', 'neg_count', 'pos_count'], data =[np_count, p_count, neg_count, pos_count])
df.to_csv('output.csv')
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