' '.format*=()
时间: 2024-01-24 20:04:53 浏览: 14
This code will result in a syntax error because there is no value or variable specified for the format method to format. The format method requires at least one argument, which can be a value or a variable, and may also accept additional arguments for specifying formatting options.
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import numpy as np def frame2mat(frameBuffer): """将帧信息转换为numpy的矩阵对象,后续可以通过opencv的cvtColor转换为特定的图像格式""" frame, buffer = frameBuffer bits = np.uint8 if (frame.bits == Bits.BITS_8) else np.uint16 shape = None if frame.format >= ImageFormat.FORMAT_MONO and frame.format <= ImageFormat.FORMAT_BAYER_RG: shape = 1 elif frame.format == ImageFormat.FORMAT_BGR24 or frame.format == ImageFormat.FORMAT_RGB24: shape = 3 elif frame.format == ImageFormat.FORMAT_BGR32 or frame.format == ImageFormat.FORMAT_RGB32: shape = 4 else: return None mat = np.ndarray(shape=(frame.iHeight, frame.iWidth, shape), dtype=bits, buffer=buffer) return mat帮我优化
可以对该函数进行以下优化:
1. 将np.uint8和np.uint16定义为常量,避免在函数调用时重复创建。
2. 通过字典存储格式信息和对应的shape,避免使用大量的if-else语句。
3. 将np.ndarray的shape参数修改为元组类型,避免在函数调用时创建新的元组对象。
修改后的代码如下:
```python
import numpy as np
UINT8 = np.uint8
UINT16 = np.uint16
SHAPE_DICT = {
ImageFormat.FORMAT_MONO: (1,),
ImageFormat.FORMAT_YUV422: (1,),
ImageFormat.FORMAT_BGR24: (3,),
ImageFormat.FORMAT_RGB24: (3,),
ImageFormat.FORMAT_BGR32: (4,),
ImageFormat.FORMAT_RGB32: (4,),
ImageFormat.FORMAT_BAYER_RG: (1,)
}
def frame2mat(frameBuffer):
"""将帧信息转换为numpy的矩阵对象,后续可以通过opencv的cvtColor转换为特定的图像格式"""
frame, buffer = frameBuffer
bits = UINT8 if frame.bits == Bits.BITS_8 else UINT16
shape = SHAPE_DICT.get(frame.format)
if shape is None:
return None
mat = np.ndarray(shape=(frame.iHeight, frame.iWidth, *shape), dtype=bits, buffer=buffer)
return mat
```
修正以下python代码:class Ticket: def __init__(self, day, discount=False): self.day = day self.discount = discount def get_ticket_price(self, num): if self.day == "周一": print("博物馆周一闭馆,不提供售票服务") elif self.day == "周二" or "周三" or "周四" or "周五": if self.discount: price = 80 else: price = 100 print("总共需支付票价{}".format(num * price)) elif self.day == "周六" or "周日": if self.discount: price = 88 else: price = 110 print("总共需支付票价{}".format(num * price))
修正后的代码如下:
```
class Ticket:
def __init__(self, day, discount=False):
self.day = day
self.discount = discount
def get_ticket_price(self, num):
if self.day == "周一":
print("博物馆周一闭馆,不提供售票服务")
elif self.day in ["周二", "周三", "周四", "周五"]:
if self.discount:
price = 80
else:
price = 100
print("总共需支付票价{}".format(num * price))
elif self.day in ["周六", "周日"]:
if self.discount:
price = 88
else:
price = 110
print("总共需支付票价{}".format(num * price))
```
修改的内容如下:
- 在第8行,将 `elif self.day == "周二" or "周三" or "周四" or "周五"` 改为 `elif self.day in ["周二", "周三", "周四", "周五"]`,因为原来的表达式会被解释为 `elif (self.day == "周二") or ("周三") or ("周四") or ("周五")`,这样的结果是始终为 `True`,因为非空字符串被视为 `True`。
- 在第13行,将 `elif self.day == "周六" or "周日"` 改为 `elif self.day in ["周六", "周日"]`,原因同上。