Python：打印语句显示所有行，但仅将最后一行写入文件

Question

这是我的带有硬编码项目的概念证明脚本。我写这篇文章是为了将用户输入地址列表与从县地址列表中提取的地址的唯一项目列表进行比较。使用街道名称，我正在使用 difflib 查找最匹配的正确地址，以清理常见的拼写错误、不正确的道路名称和格式。我不明白为什么这写得不正确。如果你能帮助我，那就太好了。输出不需要是 .txt。这正是我用来练习的。

这似乎是一个简单的错误，但我无法弄清楚。在我的 IDE 中运行 print 语句时，结果很完美：OBJECTID、LONG、LAT、ADDRESS

1,-121.5013397,38.57353936,624 Q ST
2,-121.4889809,38.58067826,1229 I ST
3,-121.6252964,38.68504066,7208 W ELKHORN BLVD
4,-121.4648967,38.57105638,3145 GRANADA WY
5,-121.5034945,38.56493704,731 BROADWAY
6,-121.4643582,38.54432866,3301 MARTIN LUTHER KING JR BLVD
7,-121.4267998,38.46806583,6500 WYNDHAM DR
8,-121.4277157,38.56776765,5990 H ST
9,-121.4261309,38.52390186,5642 66TH ST
10,-121.5312586,38.49791376,785 FLORIN ROAD
11,-121.4836172,38.53385557,4500 24TH ST
12,-121.5182376,38.51647637,1100 43RD AV
13,-121.4826673,38.59115124,1341 N C STREET
14,-121.497416,38.615358,1640 W EL CAMINO
15,-121.4798681,38.49076918,7363 24TH ST
16,-121.435397,38.64776157,1311 BELL AVE
17,-121.435397,38.64776157, 
18,-121.479827,38.64700504,746 NORTH MARKET BLVD
19,-121.4275146,38.59602966,1700 CHALLENGE WY
20,-121.4476495,38.61318471,2512 RIO LINDA BLVD
21,-121.5036868,38.67119467,1901 CLUB CENTER DR
22,-121.54029,38.6446808,4201 EL CENTRO RD
23,-121.4656495,38.51005465,3720 47TH AVE
24,-121.4538398,38.48538997,7927 EAST PARKWAY
25,-121.3928243,38.54872313,3301 JULLIARD DR
26,-121.4656495,38.51005465, 

在它写入的 .txt 中，我得到的只是：

26,-121.4656495,38.51005465, 

这是我所拥有的：

import csv
import usaddress
import difflib


def cls_name(stname, list):
    c = difflib.get_close_matches(
        stname,
        list)[0]
    return str(c)


unqlst = ['Q ST', 'I ST', 'W ELKHORN BLVD', 'GRANADA WY', 'BROADWAY', 'MARTIN LUTHER KING JR BLVD', 'WYNDHAM DR',
          'H ST', '66TH ST', 'FLORIN ROAD', '24TH ST', '43RD AV', 'N C STREET', 'W EL CAMINO', '24TH ST', 'BELL AVE',
          'NORTH MARKET BLVD', 'CHALLENGE WY', 'RIO LINDA BLVD', 'CLUB CENTER DR', 'EL CENTRO RD', '47TH AVE',
          'EAST PARKWAY']

# path = r'C:\Users\Michael\Desktop\Fire_Stations.csv'
# with open(path) as file:
with open(r"C:\Users\Michael\Desktop\Fire_Stations.csv") as csv_file:
    csv_reader = csv.reader(csv_file, delimiter=',')
    # the below statement will skip the first row
    next(csv_reader)
    for line in csv_file:
        line = line.split(',')
        addys = line[3]
        # addys = addys.strip('\n')
        addys = addys.upper()
        addys = usaddress.tag(addys)  # prototype: getting parcel address w/o numbers for phase one cleaning, only
        try:
            rdnum = addys[0]['AddressNumber']  # Needed Try/Except I think because first title line
        except KeyError:
            rdnum = ''
        try:
            rsdir = addys[0]['StreetNamePreDirectional']
        except KeyError:
            rsdir = ''
        try:
            rdname = addys[0]['StreetName']
        except KeyError:
            rdname = ''
        try:
            rddsg = addys[0]['StreetNamePostType']
        except KeyError:
            rddsg = ''
        wrdsrdname = (rsdir, rdname, rddsg)
        wrdsrdname = " ".join(wrdsrdname)
        wrdsrdname = wrdsrdname.strip()

        try:
            if wrdsrdname in unqlst:  # if roadname is in the unique list from counties file, do nothing, if not find closest in list
                # print('ADDRESS CORRECT')
                pass  # print(rdname)
            else:
                wrdsrdname = cls_name(wrdsrdname, unqlst)  # calling fuction to find closest name
                # print('ADDRESS INCORRECT BUT FIXED')
            # print(rdname)
        except:
            # print('error002: no address match')
            pass

        tgthr = (rdnum, wrdsrdname)
        final = (' '.join(tgthr))
        # print(final)

        # header = ['OBJECTID', 'LONG', 'LAT', 'ADDRESS']

        data = [line[0], line[1], line[2], final]
        data = ','.join(data)
        print(data)

with open('Fire_Stations.txt', 'w') as f:
    f.write(data)

Answer 1

因为您在循环中创建了data，因此它会逐行打印它们。另外，它只记住data的最后一个状态，我们只需要使用像all_data这样的“更全局”来代替。

all_data = ''
for line in csv_file:
    # your code goes here
    data = [line[0], line[1], line[2], final]
    data = ','.join(data)
    all_data += data + '\n'
    print(data)
    
with open('Fire_Stations.txt', 'w') as f:
    f.write(all_data)

Answer 2

这是因为 print 在 for 循环中而 write 不在，要在文件中写入所有数据，您需要在 for 循环之前打开文件并在 for 循环中追加文件中的数据。