Question

我想使用csv以这种格式将列表的字典写到csv文件中：

Ola, elizabethy, beale/cambray,st_hildas
Evie, st_hildas,beale/cambray,elizabethn
Lorna,   beale/cambray,elizabethn,st_hildas

这样我最终可以将其写入如下所示的excel文件中：

Ola     elizabethy      beale/cambray    st_hildas
Evie    st_hildas       beale/cambray    elizabethn
Lorna   beale/cambray   elizabethn       st_hildas

这是它在python中的外观。

students = {"Ola":["elizabethy","beale/cambray","st_hildas"],"Evie":["st_hildas","beale/cambray","elizabethn"],"Lorna":["beale/cambray","elizabethn","st_hildas"],"Morgan":["st_hildas","beale/cambray","elizabethy"],"Ola1":["beale/cambray","elizabethn","st_hildas"],"Lorna1":["elizabethn","beale/cambray","st_hildas"],"Lorna2":["beale/cambray","elizabethn","st_hildas"],"Evie1":["st_hildas","beale/cambray","elizabethy"],"Evie3":["st_hildas","beale/cambray","elizabethn"]}

Answer 1

d$X <- unlist(lapply(1:nrow(d), function(x){
                  ifelse(is.na(d[x,]$X), d[x-1,]$X, d[x,]$X)
                  }
       ))

Answer 2

要写入CSV文件（不导入任何库）

students = {
    "Ola":["elizabethy","beale/cambray","st_hildas"],
    "Evie":["st_hildas","beale/cambray","elizabethn"],
    "Lorna":["beale/cambray","elizabethn","st_hildas"],
    "Morgan":["st_hildas","beale/cambray","elizabethy"],
    "Ola1":["beale/cambray","elizabethn","st_hildas"],
    "Lorna1":["elizabethn","beale/cambray","st_hildas"],
    "Lorna2":["beale/cambray","elizabethn","st_hildas"],
    "Evie1":["st_hildas","beale/cambray","elizabethy"],
    "Evie3":["st_hildas","beale/cambray","elizabethn"]}

with open('test.csv', 'w') as f:
    for key in students.keys():
        f.write("%s, %s\n"%(key,','.join(students[key])))

要将CSV重新读回字典中：

students1 = dict()
with open('test.csv', 'r') as f:
    for line in f:
       key, value = line.strip().split(', ')
       students1[key] = value.split(',')

Answer 3

from reportlab.platypus.doctemplate import SimpleDocTemplate
from reportlab.platypus.flowables import TopPadder
from reportlab.platypus import Table, Paragraph

from reportlab.lib.styles import getSampleStyleSheet
from reportlab.lib import colors

import numpy as np


document = SimpleDocTemplate('padding_test.pdf')

table = Table(np.random.rand(2,2).tolist(),
              style=[('GRID', (0, 0), (-1, -1), 0.5, colors.black)])
styles = getSampleStyleSheet()
paragraph = Paragraph('Some paragraphs', style=styles['Normal'])

document.build([
    paragraph,
    TopPadder(table),
])

# This should generate a single pdf page with text at the top and a table at the bottom.

如何以这种格式将列表的字典写入csv文件

3 个答案: