[英]Compare two csv files to ouput the matches Python
我有一个名为“ organs.csv”的csv文件,另一个具有大量数据的csv文件。 我正在比较它们以获得它们之间的匹配。 后一个文件没有任何特定格式,因此我不知道哪一列包含有关器官的数据。 我试过下面的代码来获取匹配项,但是有两个问题。
我希望它执行以下操作:
码:
import csv
filename = "file.csv"
complist, orglist = [], []
fileA = open(filename, "rb")
reader = csv.reader(fileA, delimiter=',')
for row in reader:
for row_str in row:
complist.append(row_str)
with open("organs.csv", "rb") as fileB:
reader = csv.reader(fileB, delimiter='\n')
for row in reader:
orglist += row
orglist = [x.lower() for x in orglist]
org = open ("organ_matches.txt", "wb")
org_writer = csv.writer(org)
for s in complist:
for xs in orglist:
if xs in s:
print >> org, xs
org.close()
orgfile = open ("organ_matches.txt" , "r")
organ = orgfile.read()
organ = organ.split("\n")
organ = ",".join (organ)
organ = organ.split(",")
orgfile.close()
print organ
csv1:
forearm
leg
abdomen
csv2:
h1,h2,h3,h4
data1,forearm biopsy,tissue,cell
data2,leg injury,tissue in leg,cell9
data4,data,tissue4,cell6
现在可以打印:
['forearm','leg','leg']
所需的输出:
['forearm','leg','-']
在这里,我最终使用列表推导 *
来存储器官名称,接下来,我在另一个文件的第二行到最后一行循环,使用stop
辅助变量一次从两个循环退出(这是您没有做的事情)赶上...)。
organs = [line.strip() for line in file('uno.csv')]
matches = []
for line in [line for line in file('due.csv')][1:]:
stop = 0
matches.append('-')
for item in line.split(','):
if stop : break
for organ in organs:
if organ in item:
matches[-1] = organ
stop = 1
print matches
在这里,我删除了不起眼的辅助变量,并使用了更棘手,更晦涩但更令人愉快的方法(对我来说...)
organs = [line.strip() for line in file('uno.csv')]
matches = []
for line in [line for line in file('due.csv')][1:]:
match = '-'
for item in line.split(','):
if match != '-' : break
for organ in organs:
if organ in item:
match = organ
matches.append(match)
print matches
['forearm', 'leg', '-']
*
编辑 organs
的顺序似乎对您很重要,因此我将用于存储器官名称的数据结构从一组更改为一个列表。
编辑#2
从OP可以清楚地看到,对于due.csv
每一行,只需要一个匹配项即可。 我不知道(回想起来)如何只选择一场比赛。
我认为,我们要扫描的item
S IN各line
从左至右和停止扫描,当我们找到一个匹配,到目前为止好......但如果一个item
不止一个匹配的organ
?
我当前的代码总是在organs
上完成for
循环,因此附加的匹配项是uno.csv
定义的顺序中的最后一个匹配uno.csv
...
如果所请求的匹配是第一个,则必须修改我的代码for
在organs
上的for
循环中添加一个break
for organ in organs:
if organ in item:
match = organ
break
就是说,选择是你的...
以下代码通常可以正常工作,而忽略csv2的标题行:
import csv
orglist = []
organ_matches = []
# Generate list of organs
with open('organs.csv', 'rb') as f_org:
csv_f = csv.reader(f_org)
for row in csv_f:
orglist.append(row[0])
# Convert to a set
set_org = set(orglist)
# Read csv2 file
with open('file.csv', 'rb') as f_tbl:
# Open output file to write to
with open('organ_matches.txt', 'wb') as f_out:
csv_f = csv.reader(f_tbl)
csv_f.next() # Ignore header
for row in csv_f:
set_row = set(' '.join(row).split(' ')) # Combine list elements and separate words
# Find common words with organs list and select only one
if set_row.intersection(set_org):
organ_match = list(set_row.intersection(set_org))[0]
else:
organ_match = '-'
organ_matches.append(organ_match)
f_out.write(organ_match + '\n')
您只需对数据文件(complist)进行一次循环,即可删除多余的嵌套循环。
这样您:
for s in complist: for xs in orglist: if xs in s: print >> org, xs
变成:
for s in complist: if s in orglist: print >> org, s else: print >> org, '-'
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