我有一个这样的文件
grouping data-rate-parameters {
description
"Data rate configuration parameters.";
reference
"ITU-T G.997.2 clause 7.2.1.";
leaf maximum-net-data-rate {
type bbf-yang:data-rate32;
default "4294967295";
description
"Defines the value of the maximum net data rate (see clause
11.4.2.2/G.9701).";
reference
"ITU-T G.997.2 clause 7.2.1.1 (MAXNDR).";
}
leaf psd-level {
type psd-level;
description
"The PSD level of the referenced sub-carrier.";
}
}
}
grouping line-spectrum-profile {
description
"Defines the parameters contained in a line spectrum
profile.";
leaf profiles {
type union {
type enumeration {
enum "all" {
description
"Used to indicate that all profiles are allowed.";
}
}
type profiles;
}
这里我想提取每个叶子 block 。例如,叶最大净数据速率 block 是
leaf maximum-net-data-rate {
type bbf-yang:data-rate32;
default "4294967295";
description
"Defines the value of the maximum net data rate (see clause
11.4.2.2/G.9701).";
reference
"ITU-T G.997.2 clause 7.2.1.1 (MAXNDR).";
}
像这样我想提取
我尝试使用这段代码,这里基于大括号('{')的计数,我试图读取该 block
with open(r'file.txt','r') as f:
leaf_part = []
count = 0
c = 'psd-level'
for line in f:
if 'leaf %s {'%c in line:
cur_line=line
for line in f:
pre_line=cur_line
cur_line=line
if '{' in pre_line:
leaf_part.append(pre_line)
count+=1
elif '}' in pre_line:
leaf_part.append(pre_line)
count-=1
elif count==0:
break
else:
leaf_part.append(pre_line)
它适用于leaf max-net-data-rate
,但不适用于leaf psd-level
在对leaf psd-level
进行操作时,它也会显示出 block 线。
帮助我完成这个任务。
最佳答案
它只需要在你的break循环中进行简单的编辑,因为多个右括号'}'你的计数已经是负数,因此你需要用
更改该行elif count<=0:
break
但它仍然在您的列表中附加多个大括号,因此您可以通过保留左括号的记录来处理它,我更改了代码如下:
with open(r'file.txt','r') as f:
leaf_part = []
braces_record = []
count = 0
c = 'psd-level'
for line in f:
if 'leaf %s {'%c in line:
braces_record.append('{')
cur_line=line
for line in f:
pre_line=cur_line
cur_line=line
if '{' in pre_line:
braces_record.append('{')
leaf_part.append(pre_line)
count+=1
elif '}' in pre_line:
try:
braces_record.pop()
if len(braces_record)>0:
leaf_part.append(pre_line)
except:
pass
count-=1
elif count<=0:
break
elif '}' not in pre_line:
leaf_part.append(pre_line)
以上代码的结果:
leaf psd-level { type psd-level; description "The PSD level of the referenced sub-carrier."; }
关于python - 如何使用 python 从给定文件中提取行 block ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44107260/