day006

0.1 determine the syntax

Single-branch structure

if conditions are true output

Two-branch structure

if conditions are true output

else output condition is not satisfied

Multi-branch structure

elif (unlimited write)

elif (no limit written) conditions are met Output

elif (no limit written)

else

= Score (20 is) 
IF Score> = 90: 
  Print ( 'excellent') 
elif Score> = 80: 
  Print ( 'good') 
elif Score> = 70: 
  Print ( 'Normal') 
the else: #OR elif Score <70: 
  print ( 'difference')

for i in range(1,13):
  for j in range(1,32):
      if i in[4,6,9,10,11] and j>30:
          continue
      '''if i<8and i % 2 == 0 and j>30:
          continue
      if i>7and i%2==1 and j>30:
          continue'''
      if i==2 and j>28:
          continue
      print(f'{i}月{j}日 运动')

range (1,10) # turn digital output 1,2,3, ......, 8,9

Formatted output

String preceded f, so that the character defined in {} is the variable name

for nested loop; inner loop has completed, the outer loop will go

for + break; cycle is ended early, goes directly to the outer loop

for + continue; skip this cycle, the next cycle directly

for i in range(1,13):
  for j in range(1,32):
      if i in[4,6,9,10,11] and j>30:
          continue
      '''if i<8and i % 2 == 0 and j>30:
          continue
      if i>7and i%2==1 and j>30:
          continue'''
      if i==2 and j>28:
          continue
      print(f'{i}月{j}日 运动')

02 reptiles

Reptiles and the three-part song:

1. Send request 2. Parse the data 3. Save the data

The essence of reptiles

1. Analysis of website communication process

2. The data come from analysis to find super

3. Analysis of pocketing strategic objectives websites

4. Write attacks pocketing strategy based on the destination site, access data

json

It is a type of third-party data

json.dumps () # python converting data format to the data format json

json.loads (). # json converts the data format into a data format python

User-Agent

One kind of pocketing strategy to determine whether it is through the User-Agent browser

day 006