Python 文本换行

文本换行在从某个源中获取的文本没有按照可用的屏幕宽度正确格式化显示时是必需的。这可以通过使用下面的包来实现，在我们的环境中可以使用下面的命令进行安装。

pip install parawrap

下面的段落中有一串连续的文本。应用 wrap 函数后，我们可以看到文本如何被分隔成由逗号分隔的多行。

import parawrap

text = "In late summer 1945, guests are gathered for the wedding reception of Don Vito Corleone's daughter Connie (Talia Shire) and Carlo Rizzi (Gianni Russo). Vito (Marlon Brando), the head of the Corleone Mafia family, is known to friends and associates as Godfather. He and Tom Hagen (Robert Duvall), the Corleone family lawyer, are hearing requests for favors because, according to Italian tradition, no Sicilian can refuse a request on his daughter's wedding day. One of the men who asks the Don for a favor is Amerigo Bonasera, a successful mortician and acquaintance of the Don, whose daughter was brutally beaten by two young men because she refused their advances; the men received minimal punishment from the presiding judge. The Don is disappointed in Bonasera, who'd avoided most contact with the Don due to Corleone's nefarious business dealings. The Don's wife is godmother to Bonasera's shamed daughter, a relationship the Don uses to extract new loyalty from the undertaker. The Don agrees to have his men punish the young men responsible (in a non-lethal manner) in return for future service if necessary."

print parawrap.wrap(text)

运行上述程序时，我们得到以下输出：

['In late summer 1945, guests are gathered for the wedding reception of', "Don Vito Corleone's daughter Connie (Talia Shire) and Carlo Rizzi", '(Gianni Russo). Vito (Marlon Brando), the head of the Corleone Mafia', 'family, is known to friends and associates as Godfather. He and Tom', 'Hagen (Robert Duvall), the Corleone family lawyer, are hearing', 'requests for favors because, according to Italian tradition, no', "Sicilian can refuse a request on his daughter's wedding day. One of", 'the men who asks the Don for a favor is Amerigo Bonasera, a successful', 'mortician and acquaintance of the Don, whose daughter was brutally', 'beaten by two young men because she refused their advances; the men', 'received minimal punishment from the presiding judge. The Don is', "disappointed in Bonasera, who'd avoided most contact with the Don due", "to Corleone's nefarious business dealings. The Don's wife is godmother", "to Bonasera's shamed daughter, a relationship the Don uses to extract", 'new loyalty from the undertaker. The Don agrees to have his men punish', 'the young men responsible (in a non-lethal manner) in return for', 'future service if necessary.']

我们还可以将wrap函数应用到特定宽度的输入参数上，如果需要的话，会截断单词以保持wrap函数所需的宽度。

import parawrap

text = "In late summer 1945, guests are gathered for the wedding reception of Don Vito Corleone's daughter Connie (Talia Shire) and Carlo Rizzi (Gianni Russo). Vito (Marlon Brando), the head of the Corleone Mafia family, is known to friends and associates as Godfather. He and Tom Hagen (Robert Duvall), the Corleone family lawyer, are hearing requests for favors because, according to Italian tradition, no Sicilian can refuse a request on his daughter's wedding day. One of the men who asks the Don for a favor is Amerigo Bonasera, a successful mortician and acquaintance of the Don, whose daughter was brutally beaten by two young men because she refused their advances; the men received minimal punishment from the presiding judge. The Don is disappointed in Bonasera, who'd avoided most contact with the Don due to Corleone's nefarious business dealings. The Don's wife is godmother to Bonasera's shamed daughter, a relationship the Don uses to extract new loyalty from the undertaker. The Don agrees to have his men punish the young men responsible (in a non-lethal manner) in return for future service if necessary."

print parawrap.wrap(text,5)

当我们运行上面的程序时，我们得到以下输出：

['In', 'late ', 'summe', 'r', '1945,', 'guest', 's are', 'gathe', 'red', 'for', 'the w', 'eddin', 'g rec', 'eptio', 'n of', 'Don', 'Vito ', 'Corle', "one's", 'daugh', 'ter C', 'onnie', '(Tali', 'a Shi', 're)', 'and', 'Carlo', 'Rizzi', '(Gian', 'ni Ru', 'sso).', 'Vito ', '(Marl', 'on Br', 'ando)', ', the', 'head', 'of', 'the C', 'orleo', 'ne', 'Mafia', 'famil', 'y, is', 'known', 'to fr', 'iends', 'and a', 'ssoci', 'ates', 'as Go', 'dfath', 'er.', 'He', 'and', 'Tom', 'Hagen', '(Robe', 'rt Du', 'vall)', ', the', 'Corle', 'one f', 'amily', 'lawye', 'r,', 'are h', 'earin', 'g req', 'uests', 'for f', 'avors', 'becau', 'se, a', 'ccord', 'ing', 'to It', 'alian', 'tradi', 'tion,', 'no Si', 'cilia', 'n can', 'refus', 'e a r', 'eques', 't on', 'his d', 'aught', "er's ", 'weddi', 'ng', 'day.', 'One', 'of', 'the', 'men', 'who', 'asks', 'the', 'Don', 'for a', 'favor', 'is Am', 'erigo', 'Bonas', 'era,', 'a suc', 'cessf', 'ul mo', 'rtici', 'an', 'and a', 'cquai', 'ntanc', 'e of', 'the', 'Don,', 'whose', 'daugh', 'ter', 'was b', 'rutal', 'ly be', 'aten', 'by', 'two', 'young', 'men b', 'ecaus', 'e she', 'refus', 'ed', 'their', 'advan', 'ces;', 'the', 'men r', 'eceiv', 'ed mi', 'nimal', 'punis', 'hment', 'from', 'the p', 'resid', 'ing j', 'udge.', 'The', 'Don', 'is di', 'sappo', 'inted', 'in Bo', 'naser', 'a,', "who'd", 'avoid', 'ed', 'most ', 'conta', 'ct', 'with', 'the', 'Don', 'due', 'to Co', 'rleon', "e's n", 'efari', 'ous b', 'usine', 'ss de', 'aling', 's.', 'The', "Don's", 'wife', 'is go', 'dmoth', 'er to', 'Bonas', "era's", 'shame', 'd dau', 'ghter', ', a r', 'elati', 'onshi', 'p the', 'Don', 'uses', 'to ex', 'tract', 'new l', 'oyalt', 'y', 'from', 'the u', 'ndert', 'aker.', 'The', 'Don a', 'grees', 'to', 'have', 'his', 'men p', 'unish', 'the', 'young', 'men r', 'espon', 'sible', '(in a', 'non-l', 'ethal', 'manne', 'r) in', 'retur', 'n for', 'futur', 'e ser', 'vice', 'if ne', 'cessa', 'ry.']