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python xlwtライブラリでExcelセルの背景色を変更するにはどうすればよいですか?

xlwt Pythonライブラリを使用して、Excelワークブックにデータを書き込みます。
そして今、Excelセルに背景色を追加する際にいくつか問題があります。

たとえば、RGB(10,20,30)の次の色がありますが、これを行う最も簡単な方法は何ですか?この色をセルに設定する方法はありますか?

私は this 私の問題に似た投稿だけを見つけました。

13
Ishikawa Yoshi

この例では、セルの背景色を設定する方法を示しました。結果を得るために実行できます。

from xlwt import Workbook
import xlwt
book = Workbook()
sheet1 = book.add_sheet('Sheet 1')
for i in range(0, 100):
    st = xlwt.easyxf('pattern: pattern solid;')
    st.pattern.pattern_fore_colour = i
    sheet1.write(i % 24, i // 24, 'Test text', st)
book.save('simple.xls')
17
Pooria Kaviani

私はこの問題を抱えていて、たくさんの検索をしました

ついに私は適切で良い解決策を見つけました: 解決策のソース

それはとてもうまくいきます!

このクラスをプロジェクトに追加し、Excelの色を設定するだけです。

class ColorMatcher(object):
"""
the source is in : http://www.archivum.info/[email protected]/2012-09/00014/Re-(pyxl)-Re-Background-with-any-rgb-value.html

Prior to Excel 2007, Excel only had color
indexes, and that's all that xlwt supports.  Maybe this will help,
though.  It use a ColorMatcher that takes an RGB input and tries to
return the closest matching Excel color index:
"""

def __init__(self):
    self.reset()

def reset(self):
    self.unused_colors = set(self.xlwt_colors)
    # Never use black.
    self.unused_colors.discard((0, 0, 0))

#Culled from a table at http://www.mvps.org/dmcritchie/Excel/colors.htm
xlwt_colors=[
    (0,0,0), (255,255,255), (255,0,0), (0,255,0), (0,0,255), (255,255,0),
    (255,0,255), (0,255,255), (0,0,0), (255,255,255), (255,0,0), (0,255,0),
    (0,0,255), (255,255,0), (255,0,255), (0,255,255), (128,0,0), (0,128,0),
    (0,0,128), (128,128,0), (128,0,128), (0,128,128), (192,192,192),
    (128,128,128), (153,153,255), (153,51,102), (255,255,204),
    (204,255,255), (102,0,102), (255,128,128), (0,102,204), (204,204,255),
    (0,0,128), (255,0,255), (255,255,0), (0,255,255), (128,0,128),
    (128,0,0), (0,128,128), (0,0,255), (0,204,255), (204,255,255),
    (204,255,204), (255,255,153), (153,204,255), (255,153,204),
    (204,153,255), (255,204,153), (51,102,255), (51,204,204), (153,204,0),
    (255,204,0), (255,153,0), (255,102,0), (102,102,153), (150,150,150),
    (0,51,102), (51,153,102), (0,51,0), (51,51,0), (153,51,0), (153,51,102),
    (51,51,153), (51,51,51)
]

@staticmethod
def color_distance(rgb1, rgb2):
    # Adapted from Colour metric by Thiadmer Riemersma,
    # http://www.compuphase.com/cmetric.htm
    rmean = (rgb1[0] + rgb2[0]) / 2
    r = rgb1[0] - rgb2[0]
    g = rgb1[1] - rgb2[1]
    b = rgb1[2] - rgb2[2]
    return (((512 + rmean) * r * r) / 256) + 4 * g * g\
    + (((767 - rmean) * b * b) / 256)

def match_color_index(self, color):
    """Takes an "R,G,B" string or wx.Color and returns a matching xlwt
    color.
    """
    if isinstance(color, int):
        return color
    if color:
        if isinstance(color, basestring):
            rgb = map(int, color.split(','))
        else:
            rgb = color.Get()
        distances = [self.color_distance(rgb, x) for x in self.xlwt_colors]
        result = distances.index(min(distances))
        self.unused_colors.discard(self.xlwt_colors[result])
        return result

def get_unused_color(self):
    """Returns an xlwt color index that has not been previously returned by
    this instance.  Attempts to maximize the distance between the color and
    all previously used colors.
    """
    if not self.unused_colors:
        # If we somehow run out of colors, reset the color matcher.
        self.reset()
    used_colors = [c for c in self.xlwt_colors if c not in
                                                  self.unused_colors]
    result_color = max(self.unused_colors,
        key=lambda c: min(self.color_distance(c, c2)
        for c2 in used_colors))
    result_index = self.xlwt_colors.index(result_color)
    self.unused_colors.discard(result_color)
    return result_index

このコードのソースは次のとおりです: http://www.archivum.info/[email protected]/2012-09/00014/Re-%28pyxl%29-Re-Background-with-any- rgb-value.htmle

6
happy Sun
GREEN_TABLE_HEADER = easyxf(
                 'font: bold 1, name Tahoma, height 160;'
                 'align: vertical center, horizontal center, wrap on;'
                 'borders: left thin, right thin, top thin, bottom thin;'
                 'pattern: pattern solid, pattern_fore_colour green, pattern_back_colour green'
                 )
overviewSheet.row(rowCursor).write(col_0, 'Issue', GREEN_TABLE_HEADER)
2
Trinh Truong

XlsxWriterモジュールの使用をお勧めします。すばらしい機能もあります http://xlsxwriter.readthedocs.io/

1
Angie Alejo