リストを数字で並べ替える

Question

明示的な言語要件を指定していないので、これはPython 3.8の汚い解決策です。他の人がより良い方法を思い出すことができると確信していますが、これだけで十分です。

このコードは、テキストが現在のディレクトリのlist.txtというファイルにあると仮定し、new-list.txtという新しいファイルを生成します。

また、「-La isla del tesoro」で欠落しているスペースを処理しません。

import re

booklist = []
bookcount = 0
entry = ''
line_numbers = []

# Find and return the volume number for a book
def get_volnum(book):
        volstring = ''
        volstring = re.search('\\(volume (\d+)\\)', book)
        volnum = volstring.group(1)
        return volnum

# Read file and put in doc variable
doc = open('list.txt', 'r').readlines()

# Group each book in a single string and append in a booklist
for line in doc:
    # if line begins with three decimals followed by 'G.', put line in a new entry. 
    if re.match("(\d\d\d)G.*", line): 
        #read the line number and append to a list
        line_numbers.append(line.split('G.')[0])
        # Add previous entry to booklist (without the three decimals and G.)
        if bookcount > 0:
            booklist.append(entry.split('G.')[1])  

        entry = line
        bookcount +=1
    # If line begins with a '- ', concatenate the line into the current entry.
    if line.startswith('- '):
        entry += line

#Append last line
booklist.append(entry.split('G.')[1])  
# Make a list (booktable) that contains [volnum, book]
booktable = []
[booktable.append([get_volnum(book), book]) for book in booklist]

# Sort that list by volnum (index 0 of each list item of booktable)
booktable.sort(key=lambda x: int(x[0]))

line_numbers.sort()

# Write result to file
f = open("new-list.txt", "w")
for b in booktable:
    f.write(line_numbers.pop(0) + 'G.' + b[1])
    f.write('\n')

f.close()

Answer 1

明示的な言語要件を指定していないので、これはPython 3.8の汚い解決策です。他の人がより良い方法を思い出すことができると確信していますが、これだけで十分です。

このコードは、テキストが現在のディレクトリのlist.txtというファイルにあると仮定し、new-list.txtという新しいファイルを生成します。

また、「-La isla del tesoro」で欠落しているスペースを処理しません。

import re

booklist = []
bookcount = 0
entry = ''
line_numbers = []

# Find and return the volume number for a book
def get_volnum(book):
        volstring = ''
        volstring = re.search('\\(volume (\d+)\\)', book)
        volnum = volstring.group(1)
        return volnum

# Read file and put in doc variable
doc = open('list.txt', 'r').readlines()

# Group each book in a single string and append in a booklist
for line in doc:
    # if line begins with three decimals followed by 'G.', put line in a new entry. 
    if re.match("(\d\d\d)G.*", line): 
        #read the line number and append to a list
        line_numbers.append(line.split('G.')[0])
        # Add previous entry to booklist (without the three decimals and G.)
        if bookcount > 0:
            booklist.append(entry.split('G.')[1])  

        entry = line
        bookcount +=1
    # If line begins with a '- ', concatenate the line into the current entry.
    if line.startswith('- '):
        entry += line

#Append last line
booklist.append(entry.split('G.')[1])  
# Make a list (booktable) that contains [volnum, book]
booktable = []
[booktable.append([get_volnum(book), book]) for book in booklist]

# Sort that list by volnum (index 0 of each list item of booktable)
booktable.sort(key=lambda x: int(x[0]))

line_numbers.sort()

# Write result to file
f = open("new-list.txt", "w")
for b in booktable:
    f.write(line_numbers.pop(0) + 'G.' + b[1])
    f.write('\n')

f.close()

リストを数字で並べ替える

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