Question

目标： - 我需要解析一个带有以下输入的文件，并在状态被批准时获取最新的（builddate timestamp应该是最新的）位置并且builddate是最新的...我提供了示例输入和输出，我有perl中的代码，new to python，请建议如何在python

中实现

INPUT:-
Build:          M1234BAAAANAAW9321.1
Location:       \\dreyers\builds468\INTEGRATION\M1234BAAAANAA9321.1
Comments:       Build completed, labeled, and marked for retention.
Status:         Approved
BuildDate:      10/25/2012 12:51:25


Build:          M1234BAAAANAAW9321.2
Location:       \\crmbld01\Builds\FAILED\M1234BAAAANAA9321.2
Comments:       The build is currently in a failed status.
Status:         Failed
BuildDate:      10/25/2012 19:37:17


Build:          M1234BAAAANAAW9321.3
Location:       \\freeze\builds427\INTEGRATION\M1234BAAAANAA9321.3
Comments:       Build completed, labeled, and marked for retention.
Status:         Approved
BuildDate:      10/25/2012 19:43:28

OUTPUT:-\\freeze\builds427\INTEGRATION\M1234BAAAANAA9321.3

以下是实现的perl代码，我是python的新手，请建议我如何pythonize这段代码

$ echo 'Build:          M1234BAAAANAAW9321.1
Location:       \\dreyers\builds468\INTEGRATION\M1234BAAAANAAW9321.1
Comments:       Build completed, labeled, and marked for retention.
Status:         Approved
BuildDate:      10/25/2012 12:51:25


Build:          M1234BAAAANAAW9321.2
Location:       \\crmbld01\Builds\FAILED\M1234BAAAANAAW9321.2
Comments:       The build is currently in a failed status.
Status:         Failed
BuildDate:      10/25/2012 19:37:17


Build:          M1234BAAAANAAW9321.3
Location:       \\freeze\builds427\INTEGRATION\M1234BAAAANAAW9321.3
Comments:       Build completed, labeled, and marked for retention.
Status:         Approved
BuildDate:      10/25/2012 19:43:28
' | perl -e'

local $/ = "";
my ( $build_date, $location );
while ( <> ) {
next unless /status:\s+approved/i;
my $date = sprintf "%04d%02d%02d%02d%02d%02d", ( /builddate:\s+(\d
++)\D+(\d+)\D+(\d+)\D+(\d+)\D+(\d+)\D+(\d+)/i )[ 2, 0, 1, 3, 4, 5 ];
if ( !defined $build_date || $build_date lt $date ) {
    ( $build_date, $location ) = ( $date, /location:\s+(.+)/i );
    }                                                           
}

打印“$ location \ n”; “ \冷冻\ builds427 \集成\ M1234BAAAANAAW9321.3

我尝试在python中编写以下内容，似乎没有用，我想知道是否有更好的实现来实现目标..请提示

for line_info in lines:

    line_info.find('Location')

    if line_info.find('Location') == 0:
        # Build Location
        print "  Found Build location"
        logString += "  Found Build location\n"
        location = line_info.split(" ")
        location1 = location[len(location)-1]
    elif line_info.find('Status') == 0:
        # Status
        print "  Found Status"
        logString += "  Found Status\n"
        status = line_info.split(" ")
        removeEmpty(status)
        status1 = status[1].strip()
        if status1 != "Approved"
        goto .start
    elif line_info.find('BuildDate') == 0:
        # Main Make
        print "  Found BuildDate"
        logString += "  Found BuildDate\n"
        builddate1 = line_info.split(" ")
        removeEmpty(builddate1)
        builddate1 = builddate1[1]
        #if builddate1 >

Answer 1

您可以将问题分成一系列简单的步骤：

逐行阅读输入
收集'name：value'对
将记录组分组（每条记录以“构建”对开头）
选择具有非空白“BuildDate”，“位置”值
使用给定的日期/时间格式查找最新记录

实现：

#!/usr/bin/env python
import sys
from datetime  import datetime
from itertools import groupby

# find all 'name: value' pairs
file = sys.stdin
pairs = ([s.strip() for s in line.partition(':')[::2]]
         for line in file if ':' in line)

# group records
def record_start(pair, count=[False]):
    """Mark start of a record."""
    if pair[0] == 'Build':
        count[0] = not count[0]
    return count[0]
records = (dict(record) for _, record in groupby(pairs, record_start))

approved = (r for r in records if r.get('Status') == 'Approved' and
            all(r.get(name) for name in "BuildDate Location".split()))

# find latest record
def get_date(record):
    try:
        return datetime.strptime(record['BuildDate'], '%m/%d/%Y %H:%M:%S')
    except ValueError:
        return datetime.min # handle invalid date strings

latest = max(approved, key=get_date)
assert get_date(latest) != datetime.min
print(latest['Location'])

Output

\\freeze\builds427\INTEGRATION\M1234BAAAANAA9321.3

Answer 2

试试这段代码：

lastLocation = None
lastTime = None
skip = False

bestLocation = None
bestTime = None

for line in text.split('\n'):    
    line.find('Location')
    if line.find('Location') == 0:
        # Build Location
        skip = False
        print "  Found Build location"
        lastLocation = line.split(":")[1].lstrip()       
    elif line.find('Status') == 0:
        # Status
        print "  Found Status"
        status = line.split(":")
        status1 = status[1].strip()
        if status1 != "Approved":
            skip = True
    elif line.find('BuildDate') == 0 and not skip:
        # Main Make
        print "  Found BuildDate"
        timeStr = line.split(":", 1)[1].lstrip()
        lastTime = datetime.datetime.strptime(timeStr, "%m/%d/%Y %H:%M:%S")
        if bestTime == None or bestTime < lastTime:
            bestTime = lastTime
            bestLocation = lastLocation
print lastLocation

Python：如何实现获取最新位置

2 个答案:

Output