重新格式化段落

當我們處理大量文字並將其呈現為可呈現的格式時，需要格式化段落。可能只想列印具有特定寬度的每一行，或者在列印詩詞時增加每一行的縮排。 在本章中，將使用textwrap3模組根據需要格式化段落。

首先，需要安裝所需的包，如下所示 -

pip install textwrap3

環繞固定寬度

在此範例中，為段落的每一行指定了30個字元的寬度。通過為width引數指定值來使用wrap函式。

from textwrap3 import wrap

text = 'In late summer 1945, guests are gathered for the wedding reception of Don Vito Corleones 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 daughters wedding day.'

x = wrap(text, 30)
for i in range(len(x)):
    print(x[i])

當執行上面的程式時，我們得到以下輸出 -

In late summer 1945, guests
are gathered for the wedding
reception of Don Vito
Corleones 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
daughters wedding day.

變數縮排

在這個例子中，增加了要列印詩語的每一行的縮排。

import textwrap3

FileName = ("path\poem.txt")

print("**Before Formatting**")
print(" ")

data=file(FileName).readlines()
for i in range(len(data)):
   print data[i]

print(" ")
print("**After Formatting**")
print(" ")
data=file(FileName).readlines()
for i in range(len(data)):
    dedented_text = textwrap3.dedent(data[i]).strip()
    print dedented_text

當執行上面的程式時，得到以下輸出 -

**Before Formatting**

 Summer is here.
  Sky is bright.
    Birds are gone.
     Nests are empty.
      Where is Rain?

**After Formatting**

Summer is here.
Sky is bright.
Birds are gone.
Nests are empty.
Where is Rain?