try-except模块
try-except模块
作者：a_eastern
如果try代码块中的代码导致了错误，python将查找这样的except代码块，并运行其中的代码，即指定的错误与引发的错误相同。
例程：
import csv
from matplotlib import pyplot as plt
from datetime import datetime
filename = 'death_valley_2014.csv'
with open(filename) as f:
reader = csv.reader(f)
header_row = next(reader)
dates,highs,lows= [],[],[]
for row in reader:
try:
current_date = datetime.strptime(row[0],"%Y-%m-%d")
high = int(row[1])
low = int(row[3])
except ValueError:
print(current_date,'missing data')
else:
dates.append(current_date)
high = int(row[1])
highs.append(high)
low = int(row[3])
lows.append(low)
# print(highs)
fig = plt.figure(dpi=128,figsize=(10,6))
plt.plot(dates,highs,c='red',alpha=0.5)
plt.plot(dates,lows,c='blue',alpha=0.5)
plt.fill_between(dates,highs,lows,facecolor='blue',alpha=0.1)
fig.autofmt_xdate()
plt.show()
# print(header_row)
# for index,column_header in enumerate(header_row):
# print(index,column_header)
输出：
作者：a_eastern
