当字符串无法转换为数字时,int()和float()函数会抛出ValueError异常。可以使用try...except块来处理这种情况。 python string_invalid = "abc" try: int_value = int(string_invalid) except ValueError: print("无法将字符串转换为整数") try: float_value = float(string_invalid) except ValueError: print("...
int.from_bytes() int.to_bytes() isinstance() issubclass() iter() len() list locals() map() max() memoryview min() next() object oct() open() ord() pow() print() property() range() repr() reversed() round() set setattr() slice sorted() staticmethod() str sum() super() tup...
i)Create a bitmap with an image editor with only 2 bits per pixel (black and white) ii)Use the LCDAssistant (http://en.radzio.dxp.pl/bitmap_converter/ ) to generate the hex data. iii)Copy the hex data into the bitmap_converter.py file in the sample_images folder and run it on ...
定义add_ints 方法。 STATIC mp_obj_texample_add_ints(mp_obj_t a_obj,mp_obj_t b_obj){// Extract the ints from the micropython input objectsinta=mp_obj_get_int(a_obj);intb=mp_obj_get_int(b_obj);// Calculate the addition and convert to MicroPython object.returnmp_obj_new_int(a...
int wanted_pin = mp_obj_get_int(items[1]); const struct device *wanted_port = NULL; // device_get_binding(drv_name); if (!wanted_port) { mp_raise_ValueError(MP_ERROR_TEXT("invalid port")); } machine_pin_obj_t *pin = m_new_obj(machine_pin_obj_t); pin->base = machine_pin...
")time.sleep_ms(500) # 延时500mswhile True:# 获取按键值key = int(xl9555.key_scan())if...
Int32Array 32位有符号整数 长度4个字节 Uint32Array 32位无符号整数 长度4个字 Float32Array 32位浮点数 长度4个字 Float64Array 64位浮点数 长度8个字节 NO.6接收数据 微信小程序接收ESP32返回的蓝牙数据响应 官方文档 developers.weixin.qq.com 官方代码 // ArrayBuffer转16进制字符串示例 function ab2hex(...
frommathimportsin,cos## This allows sphinx to build the docs#try:fromtimeimportsleep_msexceptImportError:sleep_ms=lambdams:Noneuint=intconst=lambdax:xclassmicropython:@staticmethoddefviper(func):returnfunc@staticmethoddefnative(func):returnfunc## If you don't need to build the docs, you can rem...
{page:Section0;}#include"py/mpconfig.h"/** Core UART functions to implement for a port*/// Receive single characterint mp_hal_stdin_rx_chr(void) {unsigned char c = 0;return c;}// Send string of given lengthmp_uint_t mp_hal_stdout_tx_strn(const char *str, mp_uint_t len) {...
*data, int len){CS_LOW();DC_HIGH();mp_obj_base_t *s = (mp_obj_base_t *)MP_OBJ_TO...