刪除字符串從特定字符在python

Question

開始我在一個文件中的以下數據：

Neighbor  V   TblVer InQ OutQ Up/Down State/PfxRcd 
10.230.2.91  4   136041 0 0 35w6d  1178 
CHN_RAY_901_1AC_CASR903R004# exit 

Neighbor  V   TblVer InQ OutQ Up/Down State/PfxRcd 
10.229.5.239 4   890585 0 0 7w5d   1177 
10.229.6.239 4   890585 0 0 7w5d   1173 
CHN_MAR_905_1AC_CASR903R066# exit 

10.229.30.110 

我必須刪除從CHN開始的所有行，並且具有等的輸出：

Neighbor  V   TblVer InQ OutQ Up/Down State/PfxRcd 
10.230.2.91  4   136041 0 0 35w6d  1178 

Neighbor  V   TblVer InQ OutQ Up/Down State/PfxRcd 
10.229.5.239 4   890585 0 0 7w5d   1177 
10.229.6.239 4   890585 0 0 7w5d   1173 

10.229.30.110 

我已嘗試：

b = ' '.join(word for word in content.split(' ') if not word.startswith('CHN')) 

其中content是我的數據我想從中刪除CHN，但它不起作用。

你能提出一些方法來達到這個目的。這可以不使用正則表達式來完成嗎？提前致謝。

Answer 1

它可能會更容易與各條線，而不是整個文件內容的工作：

with open("file") as f: 
    lines = [line for line in f if not line.startswith("CHN")] 
    filtered = "".join(lines) 

Answer 2

for line in file: 
    if not line[0:3] == "CHN": 
    write_line 
    else: 
    remove_line 

Answer 3

file = """ Neighbor  V   TblVer InQ OutQ Up/Down State/PfxRcd 
10.230.2.91  4   136041 0 0 35w6d  1178 
CHN_RAY_901_1AC_CASR903R004# exit 

Neighbor  V   TblVer InQ OutQ Up/Down State/PfxRcd 
10.229.5.239 4   890585 0 0 7w5d   1177 
10.229.6.239 4   890585 0 0 7w5d   1173 
CHN_MAR_905_1AC_CASR903R066# exit 

10.229.30.110 
""" 

output = [line for line in file.splitlines() if not line.startswith('CHN')] 
print "\n".join(output)