[英]Reading a specific portion of data from a .txt file in Python
>gene1
ATGATGATGGCG
>gene2
GGCATATC
CGGATACC
>gene3
TAGCTAGCCCGC
This is the text file which I am trying to read. 这是我要阅读的文本文件。 I want to read every gene in a different string and then add it in a list There are header lines starting with '>' character to recognize if this is a start or end of a gene
我想读取不同字符串中的每个基因,然后将其添加到列表中。以“>”字符开头的标题行可以识别这是基因的开始还是结尾
with open('sequences1.txt') as input_data:
for line in input_data:
while line != ">":
list.append(line)
print(list)
When printed the list should display list should be 打印时列表应显示列表应为
list =["ATGATGATGGCG","GGCATATCCGGATACC","TAGCTAGCCCGC"]
with open('sequences1.txt') as input_data:
sequences = []
gene = []
for line in input_data:
if line.startswith('>gene'):
if gene:
sequences.append(''.join(gene))
gene = []
else:
gene.append(line.strip())
sequences.append(''.join(gene)) # append last gene
print(sequences)
output: 输出:
['ATGATGATGGCG', 'GGCATATCCGGATACC', 'TAGCTAGCCCGC']
sequences1.txt: sequence1.txt:
>gene1
ATGATGATGGCG
>gene2
GGCATATC
CGGATACC
>gene3
TAGCTAGCCCGC
and then: 接着:
desired_text = []
with open('sequences1.txt') as input_data:
content = input_data.readlines()
content = [l.strip() for l in content if l.strip()]
for line in content:
if not line.startswith('>'):
desired_text.append(line)
print(desired_text)
OUTPUT: 输出:
['ATGATGATGGCG', 'GGCATATC', 'CGGATACC', 'TAGCTAGCCCGC']
EDIT: 编辑:
Sped-read it, fixed it with the desired output 快速阅读,并使用所需的输出进行修复
with open('sequences1.txt') as input_data:
content = input_data.readlines()
# you may also want to remove empty lines
content = [l.strip() for l in content if l.strip()]
# flag
nextLine = False
# list to save the lines
textList = []
concatenated = ''
for line in content:
find_TC = line.find('gene')
if find_TC > 0:
nextLine = not nextLine
else:
if nextLine:
textList.append(line)
else:
if find_TC < 0:
if concatenated != '':
concatenated = concatenated + line
textList.append(concatenated)
else:
concatenated = line
print(textList)
OUTPUT: 输出:
['ATGATGATGGCG', 'GGCATATCCGGATACC', 'TAGCTAGCCCGC']
You have multiple mistakes in your code, look here: 您的代码中有多个错误,请看这里:
with open('sequences1.txt', 'r') as file:
list = []
for line in file.read().split('\n'):
if not line.startswith(">") and len(line$
list.append(line)
print(list)
Try this: 尝试这个:
$ cat genes.txt
>gene1
ATGATGATGGCG
>gene2
GGCATATC
CGGATACC
>gene3
TAGCTAGCCCGC
$ python
>>> genes = []
>>> with open('genes.txt') as file_:
... for line in f:
... if not line.startswith('>'):
... genes.append(line.strip())
...
>>> print(genes)
['ATGATGATGGCG', 'GGCATATC', 'CGGATACC', 'TAGCTAGCCCGC']
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