add day-01 day-02

dreamapplehappy · dreamapplehappy · commit c4d2a533f95c · 2017-07-26T19:22:26.000+08:00
diff --git a/day-01/data-typpes-and-variables.py b/day-01/data-typpes-and-variables.py
@@ -1,4 +1,5 @@
 # 整数
+import math
 from math import inf
 a = 100
 # 浮点数
@@ -83,3 +84,8 @@
 print(9 // 3)
 print(10 % 3)
 print(9 % 3)
+# 无限大的数
+print(10e100)
+
+print(float('NaN'))
+print(math.isnan(0))
diff --git a/day-02/string-and-encoding.py b/day-02/string-and-encoding.py
@@ -24,4 +24,30 @@
 
 # 格式化字符串 %s:表示字符串 %d:表示整数 %x:表示16进制数整数 %f:表示浮点数
 print('hello, %s' % 'dreamapple')
-print('%d-%d-%d' % (2017, 3, 21))
+print('%d-%d-%d' % (2017, 3, 21))
+
+# 第二次学习
+print(ord('鹏'))
+print(ord('救'))
+print(ord('命'))
+print(ord('爱'))
+print(chr(29233))
+
+# 编码的转换
+print(b'ABC')
+print('ABC'.encode('ascii')) # 转化为相应的字节
+print('我爱你'.encode('utf-8'))
+print(b'\xe6\x88\x91\xe7\x88\xb1\xe4\xbd\xa0'.decode('utf-8'))
+print(b'ABC'.decode('ascii'))
+print(b'\xe6\x88\x91'.decode('utf-8'))
+
+# 求字符串的长度或者字节数
+print(len('中国'))
+print(len('中国'.encode('utf-8')))
+
+# 格式化字符串
+print('Hello, %s' % 'world')
+# 单引号和双引号要区别开来
+print("Hello, %s; my name is %s" % ('world', 'dreamapple'))
+# 输出%
+print('print %%, %s' % 'hello')
