import csv
# 讀取字串
for row in csv.reader(
['one,two,three'])
:print
(row)
# ['one', 'two', 'three']
# 寫資料
with
open
('test_csv_data.csv'
,'w'
, newline='')
as f:
writer = csv.writer(f, delimiter=
' ',quotechar=
'|', quoting=csv.quote_minimal)
writer.writerow(
['my name is'
,'tom'
,'bob'
,'jim'
,'may'])
writer.writerow(
['color is'
,'red'
,'yellow green'
,'blue'])
# 讀資料
with
open
('test_csv_data.csv'
, newline='')
as f:
spamreader = csv.reader(f, delimiter=
' ', quotechar=
'|')
for row in spamreader:
print
(', '
.join(row)
)# my name is, tom, bob, jim, may
# color is, red, yellow green, blue
# 寫入csv檔案 writer.writerow和writer.writerows
with
open
('csv_test1.csv'
,'w'
, newline='')
as f:
# 如不指定newline='',有時則每寫入一行,將有一空行被寫入
writer = csv.writer(f)
writer.writerow(
['name'
,'age'
,'tel'])
# 寫入一行用writerow
with
open
('csv_test2.csv'
,'w'
, newline='')
as f:
# 如不指定newline='',有時則每寫入一行,將有一空行被寫入
writer = csv.writer(f)
data =[(
'tom'
,'25'
,'1367890900'),
('jim'
,'18'
,'1367890800')]
writer.writerows(data)
# 多行用writerows
## 讀取csv檔案
with
open
('csv_test1.csv'
, encoding=
'utf-8'
)as f:
csv_reader = csv.reader(f)
for row in csv_reader:
print
(row)
with
open
('csv_test2.csv'
, encoding=
'utf-8'
)as f:
csv_reader = csv.reader(f)
for row in csv_reader:
print
(row)
# ['name', 'age', 'tel']
# ['tom', '25', '1367890900']
# ['jim', '18', '1367890800']
# 以字典方式寫入csv 並讀取csv
datas =[,
,]## 以字典方式寫入csv
with
open
('test_csv_data.csv'
,'w'
, newline='')
as f:
writer = csv.dictwriter(f,
['name'
,'age'])
# 標頭在這裡傳入,作為第一行資料
writer.writeheader(
)for row in datas:
writer.writerow(row)
# 還可以寫入多行
writer.writerows(datas)
## 以字典方式讀取csv
with
open
('test_csv_data.csv'
,'r'
)as f:
reader = csv.dictreader(f)
for row in reader:
print
(row[
'name'
], row[
'age'])
# name age
# bob 23
# jerry 44
# tom 15
# bob 23
# jerry 44
# tom 15
# 捕獲和報告錯誤：
import csv, sys
filename =
'test_csv_data.csv'
with
open
(filename, newline='')
as f:
reader = csv.reader(f)
try:
for row in reader:
print
(row)
except csv.error as e:
sys.exit(
'file {}, line {}: {}'
.format
(filename, reader.line_num, e)
)
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