Certainly, here are some Python examples to demonstrate the weaknesses of using a symmetric probability distribution:

1. Lack of flexibility:
To demonstrate the lack of flexibility of symmetric probability distributions, we can compare the normal distribution to a bimodal distribution using the scipy.stats library:

```python
import numpy as np
import matplotlib.pyplot as plt
from scipy.stats import norm

# Generate a bimodal distribution
x = np.concatenate((np.random.normal(-2, 1, 1000), np.random.normal(2, 1, 1000)))

# Fit a normal distribution to the data
mu, std = norm.fit(x)

# Plot the histogram and the fitted normal distribution
plt.hist(x, bins=30, density=True, alpha=0.5)
xmin, xmax = plt.xlim()
x_range = np.linspace(xmin, xmax, 100)
p = norm.pdf(x_range, mu, std)
plt.plot(x_range, p, 'k', linewidth=2)
plt.show()
```

The resulting plot shows that the normal distribution does not fit the bimodal data very well:

2. Skewness:
To demonstrate the issue of skewness, we can generate a skewed dataset and compare the normal distribution to the skewed distribution using the scipy.stats library:

```python
from scipy.stats import skewnorm

# Generate a skewed distribution
x = skewnorm.rvs(5, size=1000)

# Fit a normal distribution to the data
mu, std = norm.fit(x)

# Plot the histogram and the fitted normal distribution
plt.hist(x, bins=30, density=True, alpha=0.5)
xmin, xmax = plt.xlim()
x_range = np.linspace(xmin, xmax, 100)
p = norm.pdf(x_range, mu, std)
plt.plot(x_range, p, 'k', linewidth=2)
plt.show()
```

The resulting plot shows that the normal distribution does not fit the skewed data very well:

3. Outliers:
To demonstrate the sensitivity of symmetric probability distributions to outliers, we can add some outliers to a dataset and compare the normal distribution to the original distribution using the scipy.stats library:

```python
# Generate a normal distribution
x = np.random.normal(0, 1, 1000)

# Add some outliers
x = np.concatenate((x, [10, -10]))

# Fit a normal distribution to the data
mu, std = norm.fit(x)

# Plot the histogram and the fitted normal distribution
plt.hist(x, bins=30, density=True, alpha=0.5)
xmin, xmax = plt.xlim()
x_range = np.linspace(xmin, xmax, 100)
p = norm.pdf(x_range, mu, std)
plt.plot(x_range, p, 'k', linewidth=2)
plt.show()
```

The resulting plot shows that the normal distribution does not capture the outliers very well:

4. Limited descriptive power:
To demonstrate the limited descriptive power of symmetric probability distributions, we can generate a multimodal dataset and compare the normal distribution to the actual data using the scipy.stats library:

```python
# Generate a multimodal distribution
x = np.concatenate((np.random.normal(-2, 1, 500), np.random.normal(2, 1, 500), np.random.normal(5, 1, 500)))

# Fit a normal distribution to the data
mu, std = norm.fit(x)

# Plot the histogram and the fitted normal distribution
plt.hist(x, bins)
```
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