Я пытаюсь создать веб-страницу 'https://www.timeanddate.com/time/dst/2018a.html', чтобы получить информацию из основной таблицы (3 столбца - Дата, Страна, Изменение местного времени).
Я использую следующий код, но я получаю только столбцы Дата и Страна в моей финальной таблице. Помогите, пожалуйста, найти столбец «Изменение местного времени».
BASE_URL=['https://www.timeanddate.com/time/dst/2018a.html']
def table_to_2d(table_tag):
rowspans = [] # track pending rowspans
rows = table_tag.find_all('tr')
# first scan, see how many columns we need
colcount = 0
for r, row in enumerate(rows):
cells = row.find_all(['th', 'td'], recursive=False)
# count columns (including spanned).
# add active rowspans from preceding rows
# we *ignore* the colspan value on the last cell, to prevent
# creating 'phantom' columns with no actual cells, only extended
# colspans. This is achieved by hardcoding the last cell width as 1.
# a colspan of 0 means “fill until the end” but can really only apply
# to the last cell; ignore it elsewhere.
colcount = max(
colcount,
sum(int(c.get('colspan', 1)) or 1 for c in cells[:-1]) + len(cells[-1:]) + len(rowspans))
# update rowspan bookkeeping; 0 is a span to the bottom.
rowspans += [int(c.get('rowspan', 1)) or len(rows) - r for c in cells]
rowspans = [s - 1 for s in rowspans if s > 1]
# it doesn't matter if there are still rowspan numbers 'active'; no extra
# rows to show in the table means the larger than 1 rowspan numbers in the
# last table row are ignored.
# build an empty matrix for all possible cells
table = [[None] * colcount for row in rows]
# fill matrix from row data
rowspans = {} # track pending rowspans, column number mapping to count
for row, row_elem in enumerate(rows):
span_offset = 0 # how many columns are skipped due to row and colspans
for col, cell in enumerate(row_elem.find_all(['td', 'th'], recursive=False)):
# adjust for preceding row and colspans
col += span_offset
while rowspans.get(col, 0):
span_offset += 1
col += 1
# fill table data
rowspan = rowspans[col] = int(cell.get('rowspan', 1)) or len(rows) - row
colspan = int(cell.get('colspan', 1)) or colcount - col
# next column is offset by the colspan
span_offset += colspan - 1
value = cell.get_text()
for drow, dcol in product(range(rowspan), range(colspan)):
try:
table[row + drow][col + dcol] = value
rowspans[col + dcol] = rowspan
except IndexError:
# rowspan or colspan outside the confines of the table
pass
# update rowspan bookkeeping
rowspans = {c: s - 1 for c, s in rowspans.items() if s > 1}
return table